167 



lacteis concentricis exhibens. Long. 10 ; alt. 8 ; lat. 6 millim. Inhabits 

 Loo Choo. W. S. 



The hinge has one large and two small approximated cardinal 

 teeth, with a triangular pit between. 



Scrobicularia (Capsa) adunca. T. ovato-triangularis, tiunida, 

 straminea, striis tenuibus concentricis lamellosis ordinatim insculpta ; 

 umbonibus paulum antemedianis, acutis ; extremitate antica semicir- 

 culari ; extrem. postica triangulari, rostrata ; margine ventrali incur- 

 vatfi ; margine dorsali excavata, levi : cavositas intra lineam pallialem 

 flavescens, extra palhdior: cardo validus. Long. 22; alt. 15; lat. 10 

 milliin. Inhabits Loo Choo. W. S. 



Quite remarkable for its sharp, hooked, beak-like posterior ex- 

 tremity. It is closely allied to Nea?ra, and looks much like Gastrana 

 fragilis. 



Tellina ltjbrica. T. cuneata, salmonacea, laevis ; umbonibus 

 fere terminalibus, acutis ; extremitate antic;! elongato-ovali ; extrem. 

 postica late truncata ; plica submarginali inconspicufi ; dente antico 

 laterali remoto, obsoleto ; postico brevi, valid o. Long. 14 ; alt. 9 ; 

 lat. 4 millim. Inhabits Hakodadi Bay, in sandy mud, 6 fath. W. S. 



Comes nearest to T. felix, which has an acute posterior angle. It 

 also closely resembles T. fabagella. 



Tellixa etjglypta. T. solida, elongata, ovalis, ex albido flaves- 

 cens, costis concentricis elevatis remotis ornata, intervallis et pagina 

 superior! costarum sulcis radiantibus recurvantibus postice profundis 

 aratis ; umbonibus medianis eminentibus ; extremitatibus subacutis, 

 postica subtruncata ; margine ventrali postice flexuosa. Cavositas 

 polita, nitida. Long. 8 ; alt. 5 ; lat. 3 millim. Inhabits ? 



A singular little shell, the generic place of which is somewhat 

 doubtful. Its hinge of two cardinal and two lateral teeth, and its 

 flexuous posterior margin and the deep pallial sinus bring it among 

 the Tellinidae ; while its sculpture, solidity, and symmetry suggest 

 Corbis, with which the hinge is not absolutely inconsistent. 



Macoma lunella. T. parvula, alba, lsevis, ovato-triangularis, 

 ventricosa ; umbonibus postmedianis, acutis ; extremitate postica 

 semicirculari ; margine postero-dorsali cito declivi, extremitate trun- 

 cata ; area postero-dorsali crasse striata ; margine postero-ventrali 

 contracts, : cavositas levis, opalina ; sinu profundo, rotundato, vix 

 conspicuo ; cardinis dentibus pusillis. Long. 10; alt. 8; lat. 6 millim. 

 Inhabits China Seas, lat. 24° N. in 25 fathoms. W. S. 



The shell most nearly approaching it is T. mera of the American 

 Atlantic shore. 



Tellina (subg. Arcopagia) saccularia. T. parvula, lucida, sub- 

 globosa, lactea, concentrice tenuissime striata ; umbonibus postmedi- 



