62 Records vf the Indian Museujii. [Voi,. XIX, 



Animal. Body comparatively short. Anterior and posterior 

 ends tapering and rounded. Pedal aperture extending be^'ond the 

 anterior margin both dorsally and ventrall}^ (nearh^ to half the 

 ventral margin). No fourth aperture. Siphons separate, very 

 short, fringed with long tentacles which extend to the adjacent 

 fused mantle margins. Anterior adductor muscle slightly elon- 

 gated. Posterior adductor muscle rounded or oval, placed back- 

 ward due to the elongation of the retractor pedis posterior muscle. 

 Retractor pedis posterior muscle very small at its insertion. Foot 

 elongated, compressed laterally and of uniform depth ; free anterior 

 end truncate obliquely. Retractor pedis anterior muscle not 

 bifurcated. Fibres of retractor pedis anterior muscle spreading 

 irregularly both inside and outside the longitudinal muscles. 

 Labial palps short, wide and triangular. Anterior lip immediately 

 behind the anterior adductor muscle. Gills heterorhabdic and 

 broadly plicate, plicae connected by interplicar tissues ; gills short 

 and wide, visceral portions much shorter than the cloacal. Outer 

 lamella of the outer gills free dorsally. Inner lamella of the inner 

 gill free dorsally in the visceral portion, but united with its fellow 

 of the opposite side below the cloacal chamber. Pyloric stomach 

 very large. Coecum arising from the postero-ventral aspect of the 

 pylorus, very short and passing ventrally and slightly anteriorly 

 with a curve. Limbs of the intestine with closely formed folds at 

 their junction. Digestive gland passing to the anterior adductor 

 muscle. Heart occupying nearly the entire length of the short 

 pericardial chamber. 



Cultellus subellipticus, Dunker. 



1861. C subellipticiis, Dunker, Proc. Zool. Soc, p. 421. 

 1874. C. siibelliptictis, Dunker, Reeve, Couch. Icon., XIX, fig. g. 

 1889. C. siibellipticus, Dunker, Clessin, Martini -Chemnit/;, Condi. 

 Cab.. XI (Solejiacea), p. 43. 



Animal. The body is comparatively short, about twice as 

 long as broad, rounded at both ends, and somewhat tapering 

 anteriorly. The pedal aperture extends anteriorly to the antero- 

 dorsal aspect of the anterior adductor muscle and ventrally beyond 

 the antero-ventral corner to the level of the posterior end of the 

 anterior adductor muscle. The siphons are very short and separate ; 

 there is a row of small tentacles round the anal and branchial 

 apertures and a row of large tentacles round them. The anterior 

 adductor muscle is broadly oval and comparatively small. The 

 posterior adductor muscle is slightly elongated. The labial palps 

 are short, triangular and tapering to a point postero-ventrally. 

 They are about one-fourth the body in length. The foot is slightly 

 longer than half the body and about twice as long as broad. The 

 retractor pedis anterior muscle is short and is directed upwards and 

 slightly forwards. 



The gills are broad, about half the body in length and 2J to 

 2|- times as long as broad. They are broadly plicate. The lamellae 

 are closely applied to each other and are connected by extensive 



