18 On Indian Deep-sea Dredging, 



epidermis ; the apex is posterior, produced, pointed, with a 

 slight spiral inclination to the left ; the posterior fifth of_ the 

 aperture is closed by a liorizontal shelly lamina. The animal 

 has the tentacles subulate and the eyes apparently absent ; 

 but the rostrum is produced, in continuation of the buccal 

 cavity, into a long proboscis, which is grooved dorsally and 

 expanded at the apex. 



Class SCAPHOPODA. 



7. An empty shell of a Denfalium was found in the stomach 

 of a starfish of the genus Plutonaster at Station 105, 740 

 fathoms. In its proportions and polished whiteness it much 

 resembles the shell of Dentalium perlongum. 



Class CEPHALOPODA. 



8. Ordy two cuttle-fishes were obtained, both of the order 

 Decapoda. One was taken at Station 101, 922 fathonis, and 

 from the transparency of its tissues, as v/ell as from the fact 

 of its being alive vvlien brought on board, we infer that it is 

 a pelagic form. The other was removed from the stomach of 

 a fish {Uranoscopus crassiceps) taken in 98 to 102 fathoms 

 (Station 96). 



Branch B. Lipocephala. 



Class LAMELLIBRANCHIATA. 



Family PectinidsB. 



9. Amussium^ sp. 



At 740 fathoms in the Laccadive Sea, on a bottom of 

 coral-mud, numerous specimens of an Amussium were found. 

 It is a species with a large, compressed, subeqiiivalve, slightly 

 inequilateral, thin, white, semitransparent shell, with small 

 subequal ears. The interior of the shell is highly polished 

 and each valve is strengthened by eleven conspicuous radiating 

 costul^e, the middle and longest of which reaches from the 

 dorsal margin only three quarters of the distance to the ventral 

 margin of the shell. The costulaj of the right valve are of 

 nearly the same width throughout ; but those of the left 

 increase in breadth from dorsum to venter, and are club- or 

 fan-shaped. The animal is white and has no vestiges of 

 pallial eyes, as has been previousl}^ observed in other species 

 of the genus. 



