In Peru the eligibility of Echenique for the Presidency is disputed, on the ground that he is not a native of that republic. An especial congress has been summoned to decide the question, but so violent is party spirit between his partisans and those of Vivanco, that apprehensions of a civil war are entertained.

Cuba is in a state of intense excitement in regard to the anticipated invasion. The flower of the Spanish army, to the number, as it is said, of 40,000 men, are concentrated on the island, which is encircled by the entire disposable naval forces of Spain. The steamer Georgia, on her late trip, had the misfortune to run aground at the mouth of the Mississippi, by which she suffered a considerable detention. It was reported and believed at Havana that she was lying off for the purpose of taking on board the marauding expedition. On the day of her arrival, a man was executed for having endeavored to procure pilots for Lopez. He had been previously subjected to torture, in order to extort a confession. This is the first public execution that has taken place for political offenses.

From Hayti we have the particulars of a conspiracy against the Emperor Soulouque, in which a number of officers of the Government were implicated. Many arrests and some executions have taken place in consequence. The attempt of the American Commissioner and the French and English Consuls to settle the controversy between the Haytians and Dominicans, is supposed to have been unsuccessful. The Government has declined to pay the claims of certain American merchants to which our Government has repeatedly called its attention.

GREAT BRITAIN.

The event of the month has been the opening of the Great Exhibition. As if to concentrate attention upon it, all other affairs of interest have been withdrawn from the stage. No little surprise and indignation were aroused by the announcement made on the 15th of April, that the Queen would open the Exhibition in person, but that the holders of tickets and exhibitors would be excluded from the ceremony. Those who had purchased tickets for the express purpose of being present at the opening, were naturally indignant at losing the most interesting part of the show. The press was unanimous in condemnation of the contemplated exclusion. It was denounced as an unworthy insinuation that the person of the Queen would not be secure in public; and as giving countenance to certain absurd rumors of a projected insurrection. The opposition was so general that the offensive announcement was withdrawn, and a new programme substituted, in accordance with which holders of season tickets were allowed to be present. The rush for these was so great, that the Commissioners immediately raised the price another guinea. The Queen proved a greater attraction than Jenny Lind had ever been. We can only glance at the opening ceremonies. Early in the morning the exhibitors took their places at their stands; and the spectators came trooping in. At half-past eleven the Commissioners, foreign and domestic, stationed themselves in front of a platform of state, under the arch of the transept. Upon the platform were the Archbishop of Canterbury, the Ministers and great Officers of State, the Embassadors and Ministers from foreign Powers, in full dress. At high noon, the royal cortège entered the Crystal Palace, the choir upraising the national anthem of "God save the Queen." Then came addresses to the Queen from the Commissioners and the foreign Embassadors, to which the Queen read answers handed to her by the Secretary of State; then followed a prayer pronounced by the Archbishop of Canterbury, and an anthem; a marching in procession along the nave; a return to the platform, and the announcement by the Queen that the Exhibition was opened, proclaimed to the thousands without by a flourish of trumpets and a royal salute from the park.

Among the visitors to the Crystal Palace during the preparations, was the Duke of Wellington. Once as he entered the French department, the workmen uncovered two small silver statuettes of the duke himself and his great rival Napoleon. The bearded foreigners raised their hats to the conqueror of Waterloo, who, returning a military salute, passed on.

The proceedings of Parliament are not wholly destitute of interest. A motion was offered by Mr. Disraeli to the effect, that in the re-adjustment of taxation, due regard should be had to the distressed condition of the agricultural classes. This was looked upon as a covert attack upon the principle of free-trade and upon the Ministers. The Ministers had a majority of only 13 in a house of 513.—The income-tax has been renewed for the third time, by a vote of 278 to 230.—Mr. Locke King's bill for extending the franchise, upon the first reading of which, in February, the Ministers suffered the defeat which led to their resignation, came up for a second reading, April 2. It was lost by an overwhelming majority—299 to 83.—Lord John Russell introduced a motion that the House should resolve itself into a committee to consider the mode of administering the oath of abjuration to persons professing the Jewish religion. It was a simple question whether religious belief should disqualify men for the exercise of civil rights and political power. The proposed alteration consists merely in omitting from the oath, when tendered to Jews, the words, "on the true faith of a Christian." The motion was vehemently opposed by one or two ultra members. Sir Robert Inglis took occasion to remind the House that "the Jews regarded him whom we regarded as our Redeemer, as a crucified impostor." Mr. Newdegate thought that the Pope might well think it safe to adopt the course he had recently pursued, when he saw the British Government and one branch of the Legislature ready to put an end to the last remnant which distinguished it as a Christian assembly. The motion prevailed by a vote of 166 to 98. It will pass the Commons, but be lost in the House of Peers; and Baron Rothschild be as far as ever from his seat in Parliament.—Lord Ashley proposed a bill to encourage the establishment of lodging-houses for the laboring classes. It empowers the authorities of cities and towns to erect buildings for this purpose and to levy a small tax to defray the cost. When the sum expended shall have been met by the proceeds of the rents, the surplus rental, after defraying expenses and the cost of repairs, is to be applied in aid of the poor rates of the place. Startling statistics are presented, setting forth the condition of the laboring classes in this respect, and the consequent disease and immorality.—The subject of the management of the colonies excites no small interest. A most elaborate speech has been made on this subject in the House of Commons by Sir William Molesworth. He proposes that all the colonies, with the exception of those which possess a peculiar value as military stations, such as Gibraltar and St. Helena, and the penal colonies, should be made to pay the expense of their own government and protection; and that ample powers of self-government should be given them. The speech, which discussed all the details of the subject, was listened to with great attention. Lord John Russell, in reply, contended that difference in race would of itself prevent the colonies from profiting by free constitutions; and if the national troops were withdrawn, the colonies would fall into hands hostile to the mother country.

Lord Torrington, whose course as Governor of Ceylon, had been brought into question in the Commons, defended himself in the House of Peers in a labored speech. His conduct in declaring and enforcing rigid martial law, during a native insurrection, was defended by Earl Grey, who referred to the Duke of Wellington as having been obliged, under similar circumstances, to adopt measures of great severity. The "Iron Duke" sharply protested against being brought into comparison, and denied that he had ever been placed in similar circumstances; as he had never been suspected of acting as Lord Torrington was charged with having done. To govern by martial law was to do so by the sole authority of the military commander; but in such circumstances he had always acted on the principle, that the government should be conducted in accordance with the laws of the country itself.

The election of Member from Aylesbury, to fill the vacancy occasioned by the death of the late Lord Nugent, the biographer of Hampden, has been declared void, on account of bribery by Mr. Calvert, the successful candidate. A new election was ordered.

A dinner has been given to Lord Stanley by a large number of Members of Parliament, in the course of which he made a speech which derives some importance from the great probability that he will in a few months be placed at the head of the Government. The gist of the speech was the assertion of the principle of "moderate duties on foreign imports, at once to afford a certain check to the unlimited importation of foreign articles, and at the same time to obtain from foreigners, in imitation of all other nations, a contribution toward the revenue of the State, and enable us to take off other taxes." This points to a renewal of the corn-laws. He also criticised the conduct of Government in relation to the "Papal Aggression," ridiculing the bill proposed as a "little microscopic measure."