PRECES PRIVATÆ, IN STUDIOSORUM GRATIAM COLLECTÆ, ET REGIA AUTHORITATE APPROBATÆ: Anno MDLXVIII. Londini Editæ; ad Vetera exemplaria denuo recognitæ.

JOHN HENRY PARKER, Oxford; and 377. Strand, London.


Just published, with ten coloured Engravings, price 5s.,

NOTES ON AQUATIC MICROSCOPIC SUBJECTS OF NATURAL HISTORY, selected from the "Microscopic Cabinet." By ANDREW PRITCHARD, M.R.I.

Also, in 8vo., pp. 720, plates 24, price 21s., or coloured, 36s.,

A HISTORY OF INFUSORIAL ANIMALCULES, Living and Fossil, containing Descriptions of every species, British and Foreign, the methods of procuring and viewing them, &c., illustrated by numerous Engravings. By ANDREW PRITCHARD, M.R.I.

"There is no work extant in which so much valuable information concerning Infusoria (Animalcules) can be found, and every Microscopist should add it to his library."—Silliman's Journal.

London: WHITTAKER & CO., Ave Maria Lane.