new Deep-sea Mollusca. 373 



somewhat more finely cancellate than the anterior, and is 

 divided off in the same manner by two approximated ribs, 

 but occupies nearly half the valve. The posterior end is 

 distinctly truncate, not curved as in G. peramahilis, 



Yoldia nicoharica, Brugui^re. 



Leda m'cobarica, Hanley in Sowerby's Thes. Conch, vol. iii. p. 136, 

 pi. ccxxiii. fig. 7. 



Hah. Nicobar Island (Chemnitz) ; off Delta of Ganges, in 

 65 fathoms {'Investigator^). 



Two fine specimens of this species were obtained by the 

 ' Investigator,' the largest being 29 millim. long, \5^ high, 

 and 10 in diameter. They are white, covered with a thin 

 olive periostracum, and not " pale tawny," as described by 

 Hanley. 



Yoldia anatina. 



Testa magna, oblonga, postice vix rostrata, inaequilateralis, 

 sordide albida, periostraco olivaceo nitente induta, concentrice et 

 oblique tenuiter striata (striis obliquis postice evanidis), baud 

 lunulata ; margo dorsi anticus leviter descendeus et curvatus, 

 posticus valde longior, declivior, rectiusculus ; margo ventris 

 antice curvatus paulo pone medium leviter incurvatus ; latus 

 anticum rotundatura, posticum angustius ; area dorsi postica 

 linearis, acute marginata ; linea cardinis fortis, dentibus anterio- 

 ribus circiter 24 et posterioribus ad 36 instructa ; pagina interna 

 dilute carnea ; cicatrices parvae, subtriangulares ; sinus pallii pro- 

 funda, linguaeformis. 



Longit. 45 millim., alt. 20, diam. 13. 



Hab. Bay of Bengal, oflt Godavari Delta, iu 258-281 

 fatlioms. 



The oblique striation is excessively fine and invisible to the 

 naked eye, much finer than in Y. nicoharica. One specimen 

 only. 



Cuspidaria approximatci. 



Testa mediocriter tenuis, globosa, postice breviter rostrata, alba, 

 prope marginem ventralem et supra rostrum periostraco luteo 

 induta, lineis incrementi tenuibus sculpta, lirisque obliquis paucis 

 apicc radiantJbus postice ornata ; margo dorsi anticus valde 

 declivis, leviter arcuatus, posticus minus declivis leviter coneavus ; 

 margo ventris antice valde arcuatus, postice late incurvatus ; 

 rostrum cunciforme, ad extremitatem arcuatim truncatum, 

 dimidio superiore nidiatim lirato ; umbones promiiientes, incur- 

 vati, paulo antemediani ; cardo in valva sinistra cdentulus, in 



