CONTENTS. 



P*gP 



A RT , X. — Monograph of the Genus llelkina. By Mr. 



John Edward Gray 62 



Art. XI.— Monograph of the Cypraeidew, a Family of Tes- 

 taceous Mollusca. By the same, (to be continued) 71 



Aut. XII. — Abstract of a " Memoir on a New Genus of the 

 Order Rodentia, named Capromys." By M. G. A. Des- 



marest ; ** 1 



Aut. XIII.— Catalogue of Birds, and of terrestrial and 

 fluviatile Molluscce found in the vicinity of Geneva. Com- 

 municated by H. T. De La Beche, Esq. M.G.S 80 



Art. XIV.— Abstract of a Memoir on the Physiology of 

 Helix Pomatia; by M. B. GaspArd, D.M.; with 



Notes, by T. Bell, Esq. F.L.S 93 



Art. XV. — Memoir on the Chemical Composition of the 

 Corneous Parts of Insects; by M. Augustus Odier. 

 Translated from the oi iginal French,isith some additional 

 Remarks and Experiments; by J. G. Children, Esq. 



F.R. 3f L.S 104 



Art. XVI. — Analytical Notices: — 



Curtis' 8 British Entomology H6 



Supplement to the Appendix of Captain Parry's Voyage, 



1819—20 ' 117 



Dilltcyn on Fossil Shells *20 



Memoir es de la Societe d' Hisloire Naturelle de Paris. . 121 



Soxierby's Mineral Conchology !23 



Genera of Recent and Fossil Shells 124 



Art. XVII. — Proceedings of Learned Societies : — 



Royal Society "4 



Linnean Society * 30 



Zoological Club of the Linnean Society 132 



Art. XVIII. — Scientific Notices : — 



Linnean Society of Calvados 1 33 



Elheria — Lamarck 1 34 



Accentor Alpinus * "4 



Plesiosaurus *35 



