170 



A small inflated species, concentrically striated like Dosinia, resem- 

 bling in form D. various and limatula, but quite destitute of coloring. 



Cardilia gemmulata. T. minuta, solida, alba, quoad altitudi- 

 nem ovato-triangularis, sub-obliqua, striis concentricis et radiantibus 

 decussantibus elevatis insculpta, intersectionibus nodosis ; umbonibus 

 acutis, uncinatis ; margine antica fere verticali ; marg. postica primo 

 recta, deinde arcuata et in marginem ventralem semicircularem 

 desinente ; valvis satis convexis fere tectiformibus ; margine interna 

 undulato-dentata ; tabella ligamentali fere obsoleta. Long. 2 ; alt. 

 2.5; lat. 2 milUm. Inbabits China Seas. W. S. 



This is the third species known, and well distinguished by its 

 sculpture. Only one valve was obtained. 



Nuculina pretiosa. T. minuta, oblique ovato-crescentica, 

 polita, nitida, fusco-viridis ; apice acuto, curvato ; margine dorsali 

 primo recta, dein valde arcuata ; margine ventrali incurvata ; ex- 

 tremitate rotundata ; pagina interiori virescente ; tabella cardinali 

 lata sensim retrorsum angustata ; denticulis binis subapicalibus, duobus 

 anticalibus, tribus post-apicalibus, laterali elongato, elevato, falcato, 

 albo. Long. 4 ; lat. 3 ; alt. 3 millim. Inhabits Simon's Bay, Cape 

 Good Hope. W. S. 



This curious shell greatly resembles an apple-seed, and seems to be 

 the only recent species yet obtained. One or more fossils have been 

 found in the Eocene, on which the genus was founded by Deshayes. 

 The lateral tooth is so large, and bridges over the umbonal cavity so 

 peculiarly that a single valve might be taken for a specimen of Latia, 

 were it not for the cardinal range of denticles which are like tenon 

 and mortise articulations, and not combbke, as in Nucula proper. 



Loripes rotata. T. solidula, flavescens, orbicularis, subglobosa, 

 striis concentricis irregularibus utrinque plus minusve coalescentibus 

 insculpta ; umbonibus medianis parvis ; lunula profunda, striis im- 

 pressis baud remotis inclusii ; margine interna concinne crenulata ; 

 cicatricibus profundis ; sulco cardinali elongato ; dente cardinali 

 valido; dente laterali postico parvo; antico obsoleto. Diameter 59 ; 

 lat. 5 millim. Inhabits Loo Choo. W. S. 



Gouldia dilecta. T. minuta, obliqua, rotundato-cordata, subglo- 

 bosa, alba, polita, antice admodum concentrice undulata ; umbonibus 

 submedianis ; margine interna simplici ; sinu palliali obvio. Long, et 

 alt. 4 ; lat. 2 millim. Inhabits Kagosima. W. S. 



The generic characters are well marked, and this is the only species 

 yet known from the Eastern Seas. 



Mysia (Felania) usta. T. oblique rotundato-ovata, lenticularis, 

 crassa, concentrice undulata, epidermide picea dura induta ; umbonibus 

 vix antemedianis, acutis ; lunula parvii, lanceolata ; extremitate antica 



