Now ready, with portraits, 2 vols, 8vo., 30s.

LIVES OF THE EARLS OF ESSEX, in the Reigns of Elizabeth, James I., and Charles I., 1540-1646. Founded upon many unpublished Private Letters and Documents. By Capt. the HON. WALTER BOURCHIER DEVEREUX, R.N.

JOHN MURRAY, Albemarle Street.


Just published, pp. 720, plates 24, price 21s.

A HISTORY OF INFUSORIAL ANIMALCULES, living and fossil, with Descriptions of all the Species, and Abstracts of the Systems of Ehrenberg, Dujardin, Kützing, Siebold, &c. By ANDREW PRITCHARD, ESQ., M.R.I.

Also, price 5s.,

A GENERAL HISTORY OF ANIMALCULES, with 500 Engravings.

Also, price 8s. 6d.,

MICROGRAPHIA, or Practical Essays on Microscopes.