Indian Deep-sea Dredging, 15 



have not in the time available made any attempts at deter- 

 mination. 



Class ECHINOIDEA. 



From the station off the west coast of the Andamans which 

 yielded such a rich result in Sponges, Umbellulids, Asteroids, 

 and Ophiuroids were also obtained numerous specimens of 

 Cidarids of the genera or subgenera Dorocidaris and Poro- 

 cidaris. 



The first of these had previously been noted by the ' Inves- 

 tigator ' as exceedingly abundant off the reefy Andaman coasts 

 in 100 to 250 fathoms. Off the Madras coast, in 1310 

 fathoms (Station 97), two specimens of a large irregular 

 Echinoid with hard, thin, and very brittle test were met with. 

 And finally, in the Laccadive Sea, at 740 and 1000 fathoms, 

 several fine specimens of Phormosoma of three different species 

 were taken. 



Class H0L0THUR0IDEA. 



In the mud of the north-western part of the Bay of Bengal 

 (Stations 76, 81, 97, 101, 102) llolothurians were fairly 

 abundant. Those near the 100-fathom limit, as far as super- 

 ficial examination goes, are indistinguishable from the 

 shallow- water forms to be found in this vicinity. Those 

 from 690 to 1310 fathoms were characteristic forms with the 

 body-wall of the mucoid or gelatinous consistence of the 

 tissues of a Medusa, defying preservation, and of a uniform 

 coloration ranging from pinkish purple to dark violet. 



In the Laccadive Sea, at 740 and 1000 fathoms, similar 

 large Holothurians were numerous ; and at the latter depth 

 two specimens of the deep-sea genus Deima, with rigid cal- 

 careous exo- skeleton, were taken. 



Phylum MOLLUSCA. 



Branch A. Glossophora. 



Class GASTROPODA. 



Family Sycotypidae. 



1. Sycotypus } sp. (Fig. 2.) 



A large species ; the shell characterized by a compara- 

 tively exsert spire, by a relatively short and broad siphonal 



