87 



the jaws from the gape. Horns, hoofs, and muzzle black. Iris 

 dark hazel. Eye mean. 



Female : as large as the male and like him in all material respects. 



Young : paler and mixed with grey. 



Inhabits the precipitous and wooded mountains of the central 

 region of Nepal, up and down which it rushes with fearful rapidity, 

 though it does not spring or leap well ; nor is it speedy. 



The exhibition was resumed of the new species of Shells con- 

 tained in the collection formed by Mr. Cuming on the Western 

 Coast of South America, and among the Islands of the South Paci- 

 fic Ocean. Those exhibited on the present evening consisted of 

 various species of Anatinidce and of the Myidous genus Saxicava : 

 they were accompanied by characters by Mr. G. B. Sowerby. 



Genus Peeiploma, Schum. 



Periploma lenticularis. Per. testd elUpticd, lenticulari, csqui- 

 valvi, albd, impoUtd, tenui ; epidermide tenuissimd ; margins 

 dorsali untied sinuatd, cum margine anticd unguium superne 

 efformunte : long. 07, lat. 0-3, alt. 0-55 poll. 



Hub. ad Insulam Muerte dictam. 



The inside of this species shines with a silvery lustre, but is not 

 iridescent. 



It was found in sandy mud at a depth of eleven fathoms. — G. B. S. 



Periploma planiuscula. Per. testd ohlongd, planiusculd, ince- 

 quivalvi, albicante, impolitd, tenuiusculd ; latere antico brevi, 

 subrugoso ; murginibus, anticd subdeclivi subtruncatd, dorsali 

 rectiusculd ; epidermide tenui, pallescente : long. 2"4, lat.Q'S, 

 alt. 1-8 poll. 



Hab. ad Sanctam Elenam. 



Odd valves alone were found on the sands. 



This species bears some resemblance to Professor Schumacher's 

 Per. intequivalvis ; it diifers, however, in shape from that species, 

 and both the valves are deeper, — G. B. S. 



Genus Anatina. 



Anatina prismatica. An. testd oblongd, subtrapeziformi, crus- 

 siusculd, opucd, lumind internd prismaticd; latere antico trun- 

 cate, hiatu maximo ; lumelld utriusque vulva internd subumbonali, 

 ex tuberculo ligumentifero decurrente, ramoque ligamenti cornei 

 fere parallelo, antice inclinuto : long. 2'7, lat. TS, alt. l' 8 poll. 



Hab. ad littora Oceani Polaris Meridionalis. (New South Shet- 

 land. ) 



Driven on shore after a gale. — G. B. S. 



Anatina costata. An. testd oblongd, albd, postic^ rostratd, 

 ^■.i,\ untied rotundatd ; costis acta radiuntibus, anticis gradatim mino- 



