412 Mr. A. Adams 07i new MoUusca from Japari. 



anfiactibus 8|^, planulatis, laevibus, suturis impressis ; apertura 

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

 marginato. 



Hub. Off Mino-Sima; from G3 fathoms. 



Skcnea cornuella, A. Adams. 



S. testa subdiscoidea, ovato-oblonga, tenui, corneo-fuscaj late umbili- 

 cata, apice elato ; anfractibus ?)\, rapide accrescentibus, rotmidatis, 

 ultimo ad peritrema soluto, striis incrementi conspicuis ; apertura 

 perobliqua, transversim ovata ; peritremate continuo, acute, integro, 

 expanse. 



Hab. OffMino-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 undulate ; 

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

 ssepe dichetomis, irregularibus, undulatis ; valva sinistra parva, 

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

 diantibus, circiter decem, ornata. 



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



This is a very sing-ular 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, insequilaterali, longiore 

 quara latiore, latere antice rotundato, postice declivo ; superficie 

 valvarum concentrice lirata, liris crenulatis, insequalibus, nennullis 

 validieribus ; liuea cardinis arcuata, area late triangular! ; fossa 

 magna profunda ; margine ventrali intus sulcate-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 arc new. 



Terebratella Marice, A. Adams. 



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

 lineis incrementi concentricis iusculpta ; valvis convexis, sequalibus, 



