CONTENTS. 



Page 

 Art. X. — Monograph of the Cenus IJelidna. Bif Mr. 



John Edwaru Gray 62 



Art. Xf. — Monograph of the Cijproiideie^ a Familjj of Tes- 

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



AuT. XII. — Abstract of a " Memoir o?i a Nezo Genus of the 

 Order Rodeniia, named Capromys.''^ DijM. G. A. Des- 



MAREST 81 



.^— Art. XIII. — Catalogue of Birds, and of terrestrial and 

 fluviatile Molluscce found in the vicinity of GenetHi. Com* 

 municaled by II. T. De La Beciie, Esq. 3I.G.S 89 



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

 Helix Pomatia ; by M. B. Gas par d, D.M.; zdfh 

 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 Odikr. 

 Tratislatedfrom the original French^with some additional 

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

 F.R. Sf L.S 104 



Art. XVI. — Attalytical Notices: — 



Curtis^ s British Entomology * 116 



Supplement to the Appendix of Captain Parry'' s Voyage, 



1819—20 117 



Billicyn on Fossil Shells 120 



Memoir es de la Societe d^ Ilistoire Nature He de Paris. . 121 



Sozcerby''s Mineral Conchology 123 



Genera of Recent and Fossil Shells 124 



Art. XVII. — Proceedings of Learned Societies: — 



Royal Society ,124 



hinnean Society 1 30 



Zoological Club of the Linnean Society 132 



Art. XVI II. — Scientific Notices: — 



Linnean Society of Calvados 1 33 



Efheria — Lamarck 1 34 



Accentor Alpinus 134 



Plesiosuurus 135 - 



