Notices respecting New Books. 55 



point of time : and likewise have the advantage of making a 

 revision of all that part of the heavens in the course of two 

 years ; a period very little longer than that which would be 

 required to execute a fine engraving of the maps. 



In Number 93 of the Astronomisclie Nachrichten published 

 by M. Schumacher, there is a description of a machine which 

 M. de Steinheil has tried and found very convenient and cor- 

 rect for marking the precise place of an observed star. If all 

 the astronomers would make use of it, it would produce re- 

 sults having a great degree of conformity amongst the whole. 



I remain, dear sir, 

 With the greatest consideration, yours, &c. &c. 



J. F. Encke. 



VIII. Notices respecting New Books. 



Preparing for Publication. 



\ PROSPECTUS has been issued of a work under the 

 ■^*- following title : — " Illustrations of Ornithology." By Sir 

 "William Jardine, Bart. F.R.S. E., F.L.S., M.W.S., &c, and 

 Prideaux John Selby, Esq., F.L.S., M.W.S., &c. : with the 

 cooperation of J. E. Bicheno, Esq., Sec. L.S., &c. ; J. G. Chil- 

 dren, Esq., F.R.S. ; Major-General T. Hardwicke, F.R.S. ; 

 T. Horsfleld, M.D., F.L.S., &c; R. Jameson, Esq. F.R.S.; 

 Sir T. S. Raffles, F.R.S.; and N. A. Vigors, Esq., F.R.S. 



General Directions for Collecting and Preserving Exotic 

 Insects and Crustacea. With illustrative Plates. By George 

 Samouelle, A.L.S. Author of" TheEntomologist's Useful Com- 

 pendium." 



ANALYSIS OF PERIODICAL WORKS ON NATURAL HISTORY. 



Zoological Journal. No. VIII. 



This Number completes, vol. ii. of The Zoological Journal, and contains 

 the following articles:— On the small horny appendage to the upper man- 

 dible in very young chickens, by Mr. Yarrell. — Mollusca Caribbaeana, by 

 the Rev. L. Guilding, including an account of a new genus, Peripatus. — 

 On the stirpes and genera of the Pselap/iidce, with descriptions of some 

 new species, bv Dr. Leach.— Catalogue of the Birds of the Farn Islands, by 

 Mr. Selby. — Sketches in Ornithology, by Mr. Vigors, including observa- 

 tions on some species of the Ramplmstidce, and on a new species of Ptero- 

 glossus {bitorquatus). — Description of a new species of Terrapene (bicolor), 

 by Mr. Bell. — On Insects which affect oaks and cherry-trees, by the late 

 Professor Peck. — On a new fossil Astacus (longimaniis), and on two new 

 species of Cyprea (umbUicata and melanostoma), by Mr. G. B. Sowerby. 

 — On the ocular points of the HelicidcB, by Mr. E. W. Brayley, jun. — De- 

 scriptions of rare or new subjects in Zoology, by Mr. Vigors.— On two new 

 species of Coleoptera, Cremastocheilus variolosus, and Priocera pusilla, by 

 Mr. Xirby. — Additions and corrections to Mr. Vigors's Sketches in Orni- 

 thology.— Analytical Notices of Books. — Zoological proceedings of So- 



cities. 



