On the Animals of certain Genera of Bivalve Shells. 09 



been going on for years, there can hardly be a new bird to be 

 found. The Mahiys skin birds remarkably well, some of them 

 preparing even the delicate Trogons most perfectly. They stuff 

 them however too tightly, and their arsenical soap is not well 

 made, many of the specimens therefore lose their feathers. 



XI. — Desa-iptions of the Animals of certain Genera of Bivalve 

 Shells. By S. P. Woodward, Esq., F.G.S. 



My dear Sir, January 5, 1855. 



Mr. S. p. Woodward has kindly drawn for me certain genera 

 of Bivalve shells which T had placed in his hands to illustrate 

 my arrangement of the Conch ifera. I forward them to you for 

 insertion in the 'Annals,' witli the notes which he has made on 

 them. 



I am, my dear Sir, yours very truly, 



John Edward Gray. 

 Dr. Francis. 



Glycimeris siliqua, Chemn. Newfoundland ? 



Mantle-lobes united, covered like the siphons with wrinkled 

 epidermis. Siphons combined, thick and muscular, not entirely 



a, a, adductor muscles ; p, pedal muscle ; s, sipbonal muscle ; /, foot ; 

 t, palpi ; g, gills. 



retractile ; orifices fringed. Pedal opening quite anterior, rather 

 small, with a thickened border. Foot thick, conical, pointed. 

 Palpi large, sickle-shaped, striated inside, with a broad plain 

 posterior border. Gills two on each side, thick, plaited (much 

 crumpled when the siphons are retracted), unequal, the outer 

 shortest and rounded in front. 



Psammobia pallida, Desh. Red Sea. 



Mantle open, margins thick, undulated, double, outer minutely 

 fringed. Siphons moderately long, thick, orifices plain ; branchial 



