412 Mr. A. Adams on new Mollusca from Japan. 



anfractibus 8, planulatis, Isevibus, suturis impressis ; apertura 

 ovali ; labio incrassato ; labro flexuoso, in medio dilatato, extus 

 marginato. 



Hab. Off Mino-Sima ; from 63 fathoms. 



Skenea cornuella, A. Adams. 



8. testa subdiscoidea, ovato-oblonga, tenui, corneo-fusca, late umbili- 

 cata, apice elato ; anfractibus 3, rapide accrescentibus, rotundatis, 

 ultimo ad peritrema soluto, striis increment! conspicuis ; apertura 

 perobliqua, transversim ovata ; peritremate continue, acuto, integro, 

 expanse. 



Hab. Off Mino-Sima; Straits of Korea ; 63 fathoms. 



Corbula bifrons, A. Adams. 



C. testa tumida, ovata ; valva sinistra minore, inclusa, inaequilaterali, 

 antice rotundata, postice subangulata, margine ventrali undulato ; 

 valva dextra magna, alba, convexa, concentrice lirata, liris confertis 

 ssepe dichotomis, irregularibus, undulatis ; valva sinistra parva, 

 inclusa, Isevi, tenuiter concentrice striata, lineis elevatis rufis ra- 

 diantibus, circiter decem, ornata. 



Hab. Straits of Korea, 63 fathoms; off Mino-Sima. 



This is a very singular little species of Corbula, single valves 

 of which are common, but perfect specimens rarely found. The 

 two valves are entirely different in form, sculpture, and colour, 

 and, unless met with in situ, would be mistaken for different 

 species. The edge of the small valve is very thin, and bent up 

 within the margin of the right or larger valve ; and the radiat- 

 ing elevated lines are continued as far as the very extreme of the 

 circumference. 



Limopsis oblonga, A. Adams. 



L. testa subtrigonali oblonga, obliqua, tumida, inaequilaterali, longiore 

 quam latiore, latere antico rotundato, postico declivo ; superficie 

 valvarum concentrice lirata, liris crenulatis, insequalibus, nonnullis 

 validioribus ; linea cardinis arcuata, area late triangulari ; fossa 

 magna profunda ; margine ventrali intus sulcato-crenato. 



Hab. Off Mino-Sima ; 63 fathoms. 



This species is unlike any hitherto described; it is in bad 

 condition, though doubtless, when fresh, it is clothed with the 

 same pilose epidermis as the other species. Other species of 

 this genus, from this sea, are known to me ; but I am unable to 

 determine whether they are new. 



Terebratella Maria, A. Adams. 



T. testa gibba elongato-ovali, Isevi, alba, nitida, minutissime punctata, 

 lineis increment! concentricis iusculpta ; valvis convexis, sequalibus, 



