166 



cardo debilissimus. Long. 28; alt. 15 ; lat. 4 millini. Taken off the 

 coast of China, 23° 30' N. in sand, 25 fathoms. W. S. 



Psammobia tenella. T. tenuis, fragilis, alba, pellucida, glabra, 

 elongato-elliptica, vel potius postice angustior et subtruneata ; um- 

 bonibus vix postmedianis, acutis ; margine dorsali postica cristata, 

 juxta umbonibus emarginata ; declivitate unibonali eonspicuo ; ex- 

 tremitate antica rotundata ; margine ventrali lente arcuata. Long. 

 1 2 ; alt. 6 ; lat. 3 milHm. Inhabits Hong Kong Harbor, in 8 fathoms. 

 W. S. 



Semele duplicata. T. ovato-reniformis, tenuis, compressa, 

 straminea, laminis erectis plerumque geminatis erectis prope apicem 

 desideratis ornata ; umbonibus postmedianis, elevatis ; margine dorsali 

 antica incurvata ; marg. postica sensim arcuata ; portione postica 

 altiori, acutiori ; plica submarginali obsoleta : cardo debilis ; dentibus 

 lateralibus approximatis. Long. 20 ; alt. 16 ; lat. 6 milUm. Inhabits 

 Kagosima Bay, in 6 fathoms, sandy bottom. W. S. 



Almost identical in form with Telllna lyra, which has a smooth fold 

 and more remote ridges. S. scabra Hanley, is similar, but has radia- 

 ting lines between the ridges. It probably grows larger. 



Semele alveata. T. subcircularis admodum convexa, fere 

 equilateralis, flavida, concentric e laminato-striata ; interspatiis radia- 

 tim clathratis, radiis laminas baud equitantibus ; plica submarginali 

 conspicua ; margine dorsali excavatfi ; extremitate postica subtrun- 

 eata. Cavositas versus umbones flavida. Long. 90; alt. 28; lat. 15 

 millim. Inhabits Loo Choo. W. S. 



Some specimens in the Cuming Coll. are rather more solid. 



Ervilia bisculpta. T. crassa, elongata, ovato-trigonalis, alba 

 vel purpurascens, concentrice sulcata excepta. area postero-dnrsali 

 radiatim aratit ; umbonibus purpureis vix antemedianis ; extremitate 

 antica rotundata ; extrem. postica oblique truncata, angulo postero- 

 ventrali acuto ; margine ventrali arcuata : cavositas nitida ; sinu 

 siphonali angusto, hnguiformi. Long. 6 ; alt. 4 ; lat. 3 millim. In- 

 habits Kagosima, in sand, 5 fath. W. S. 



The coloration and sculpture is quite pretty and peculiar. 



Ervilia livida. T. minuta, tenuis, elongata, ovato-triangularis, 

 anticc rotundata, postice acuta, rufescens vel rubido obsolete radiata 

 (intus ejusmodi picta) concentrice striatula ; umbonibus vix ante- 

 medianis : cardo debilis. Long. 7 ; alt. 4 ; lat. 3 millim. Inhabits 

 Kagosima Bay, in sand, 5 fathoms. W. S. 



Scrobicularia caduca. T. parvula, tenuis, lucida, fragilis, 

 submargaritacea, albida, ovata postice oblique truncata, subglobosa, 

 equilateralis, striis concentricis exilibus, quibusdam utroque laminosis 

 notata ; declivitate umbonali postica angulata : cavositas nitida, lineis 



