Indian Deep-sea Dredfjing. 451 



hastnim is specifically quite distinct from Flahellam lacinialum. 

 Ill the latter the calicle is more wedge-shaped, not laterally 

 compressed in the middle, and less conspicuously pedunculate, 

 and its margin is much more deeply indentated between the 

 septa ; the columella is a mere rudiment in the bottom of the 

 calicle, and the lateral costaa are much more nearly horizontal 

 and are extremely prominent, forming with their corresponding 

 septa conspicuous lateral wings. The dry corallum, like the 

 living polyp, is of a dark madder-colour. 



Our specimen measures about 2 inches in the major and 

 1*2 in the minor diameter of the calicular oridce. 



Phylum PORIFERA. 

 Class SILICOSPON&I^. 



In the Andaman Sea, Station 115, 188 to 220 fathoms, 

 proved a harvest-ticld for Sponges, as for Fishes, Crusta- 

 ceans, and Eehiiioderms. Here a large number of Hexacti- 

 nellida was obtained, including numerous huge specimens, 

 over two feet in length, of a SemjjereUa, a large Pheronemay 

 and two species of Ilyalonema. 



The depths of the Bay of Bengal yielded many Hexacti- 

 iiellid forms, among which we recognize (1) an Asconematoid 

 forming a thin- walled, shallow, broad-lipped cup, composed 

 of a felt of long spicules, from 1997 fathoms, (2) a fine speci- 

 men of an Aulochone from 1803 fathoms, (3) a small Iljalo- 

 nema from 1997 fathoms, and (4) several species of 

 Euplectellids. 



Grade A. P L astidozoa. 



Class RETICULARIA. 



In such examination as has been made of the ocean-deposit 

 brought up by the sounding-tube and trawl during the season 

 the only notable Forarainifer discovered is a large species of 

 IIor7nosina, which combines some of the characters of Horino- 

 sina ovicula, H. B. Brady, with some of those of Honnosiaa 

 monile^ H. B. Brady. The test, which is long, slender, and 

 tapering, is composed of numerous subpyriform segments 

 arranged in a straight line in a very close-set diminishing 

 series ; the walls are smooth, thick, and strong, with a com- 

 pact finely arenaceous texture ; colour red-brown. 



The larirest fracrmeut measures 8*5 millim. in length. 



