18 On Indian Deep-sea Dredging. 



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

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

 aperture is closed by a horizontal 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 Dentalium was found in the stomach 

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

 fathoms. In its proportions and polished whiteness it much 

 resembles the shell of Dentalium perlongum. 



Class CEPHALOPODA. 



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

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

 from the transparency of its tissues, as well as from the fact 

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

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

 a fish [Uranoscwpus crassiceps) taken in 98 to 102 fathoms 

 (Station 96). 



Branch B. LlPOCEPHALA. 



Class 1AIELLIBRANCHIATA. 



Family Pectinidae. 



9. Amus8ium } 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, subequi valve, 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 

 costula n , 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 

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

 pallial eyes, as has been previously observed in other species 

 of the genus. 



