Mr. A. Adams on new Molluscafrom Japan. 303 



tricoso), regulariter cancellatis ; apertura ovali ; labio tenui, sim- 

 plici ; labro in medio recto, postice angulato. Long, i poll. 

 Hab. Straits of Korea ; dredged from 63 fathoms. 



Genus Sarepta, A. Adams. 

 Testa transversim oralis, cequivalvis, sequilateralis, intus nou-margari- 



tacea. Cardo deutibus pluribus acutis in serie rectiuscula dispositis ; 



ligamento interno, in fossula centrali posito. Impressiones mus- 



culares distantes ; impressio pallii integra. 



This genus agrees with Nucula in the simple paUial line and 

 internal ligament, and with Malletia in not being nacreous or 

 pearly within^ and in general form and character. It belongs 

 to a distinct subfamily between Nuculince and Malletiince. 



Sarej)ta sjjeciosa, A. Adams. 

 S. testa ovata, alba, epidermide tenui obtecta, concentrice substrlata, 



compressiuscula, postice vix hiante, intus non-margaritacea. 

 Hab. 16 miles from Mino-Sima, Straits of Korea; from 63 

 fathoms. 



Genus Huxleyia, A. Adams. 



Testa serpuvalvis, transversim oblonga, obliqua, valde insequilateralis, 

 clausa, intus non-raargaritacea, epidermide tenui obtecta, superfi- 

 cie valvarum concentrice sulcata. Cardo deutibus sex acutis 

 divergeutibus (cristam formantibus), postice inclinatis et in lamina 

 curvata dosinentibus ; ligamento interno in fossula sub umbone. 

 Impressiones musculares distantes ; linea palliali simplici. 

 Perhaps the nearest approach to this genus is Limopsis, and 

 in some respects it also resembles Sarepta, but it differs widely 

 from both. It is named after Prof. Huxley, who has devoted so 

 much attention to the structure of the lower forms of Mollusca. 

 It would seem to belong rather to the family Arcidce than to 

 Nuculidce, the interior not being nacreous. 



Huxleyia sulcata, A. Adams. 



H. testa antice breviore, postice longiorc, valvarum superficie concen- 

 trice sulcata, sulcis profundis distantibus ; intus non-margaritacea ; 

 umbone parvo, simplici, margine ventrali integro. 



Hab. 16 miles from Mino-Sima^ Straits of Korea; dredged from 

 63 fathoms. 



P.S. I may take this occasion to observe, for the information 

 of conchologists, that Dr. Chenu, in his last beautiful work 

 (Manuel de Conchyliologie, p. 162, fig. 77ii), has figured by 

 mistake the Nassa cicgans of Kicuer as the type of Zaphon, II. 

 and A. Adams, instead of Buccinum elegans, Keeve, which is a 

 very different shell, and a very singular typical form. 

 [To be continued.] 



