341 



C v, 4. Pythina nuculoides, p. testą ovata, obtuse subcunei- 

 formi, valde inaąuilaterali, postice duplo longioreet rotundato- 

 auhattenuata, antice rotundato-subtruncata ; solidiuacula, con- 

 vexa, Icevi, ej:tus intusąue albida, nitida ; margine ventrali 

 crenato, convexo, postice acclivi ; margine dorsali antice ab- 

 rupte declivi et (vix siibconvexo) postice convexo et inodice declivi; 

 natibus subacutis ; superficie interna suleis obsoletis inferne 

 ornata : cardine valvulce dextrce dente laterali flexo, solido, 

 breyi, prominente, approximato, postice subtruncato, et dente 

 apicali valido, trigono, prominente, unico ; valvulce sinistrce 

 dente laterali longiore, solidiusculo, postice truncato, et car- 

 dinalibus duobus, quorum apicalis obliąue prominet, minoraue 

 contiguus est sublaminaris. 

 Long. \, lat. I poU. 



Hab. Huacna, Society Islands, under stones on reefs (Cumins). 

 The shape resembles that of Nucula nucleus. The iiarrow carti- 

 lage is attached to the front of the lateral tooth ; the hinge-margin 

 exhibits a minute shagreen-hke crenulation ; the muscular impres- 

 sions are strongly marked, and the palUal Une perceptibly simple. 

 Recluz s descnption of his Erycina donacina would apply to this 

 shell, were it not for the dentition. 



November 11, 1856. 



Dr. Gray, F.R.S., in the Chair. 

 The following papers were read : — 



1 . On A NeW SpECIES of SaUIRREL (SCIURUS MACROTIS) FROM 



Borneo. By J. E. Gray, Ph.D., F.R.S. etc. 

 (Mammalia, PI. XLVI.) 

 Among the specimens of animals vvhich the British Museum has 

 lately received from Mr.Wallace from Sarawak, is a large, well-marked 

 species of Sąuirrel, particular for having very large, longish pen- 

 cilled ears hke the European species, with a broad white streak on 

 the upper part of each side, and a very broad full tail, grisled, with 

 large white tips to the hairs. 



SCITJRTJS MACROTIS. (PI. XLVI.) 



Ears large, with large pencil of elongate hairs. Dark chestnut- 

 brown very nnnutelygrisled with pale tips to the hairs. Rump, out- 

 side of thighs and base of tail redder ; point of thighs bright bay : 

 feet. blackish ; upper part of the side with a broad pale streak ; 

 cheeksand mner side of legs paler; chin, throat, and beneath white; 

 tail very broad, with very long white-tipped hairs. 



Length 13, tail 11 = 24 iuches. 



Hab. Sarawak {Mr. TFallace). . 



