296 ZOOPHYTES, SPONGES, ETC. 



barnacles of more than one kind. This is well shown 

 in the figure of Hyalonema 7nasoni, F. E. Schulze (Fig. 

 96), a species taken in the Bay of Bengal in 1748 

 fathoms, whose rope has been taken possession of by 

 a crowd of barnacles to which Professor Weltner has 

 given the name Scalpelhtm sqtcamtiliferii7n. 



A very elegant Euplectellid sponge that shows to 

 perfection the graceful trellis-work arrangement of the 

 spicules of the skeleton, is Dictyaulus elegans, F. E. 

 Schulze (Fig. 97), dredged in the Laccadive Sea at a 

 depth of 705 fathoms. 



As has been written in a former chapter, the sea- 

 bottom in the southern two-thirds of the Bay of Bengal 

 consists of almost pure globigerina - ooze formed of 

 shells of dead Foraminifera — Globigerina, Pttlvinulina, 

 and Orbulina predominating — which, for the most part, 

 have fallen from somewhere near the surface. Similar 

 ooze, though mixed with a good deal of other 

 calcareous matter, occurs in the neighbourhood of 

 the Laccadives. 



All these shells are of minute size, but big Fora- 

 minifera — though by no means approaching the 

 maximum of size for this group of animalcules — with 

 shells compacted of numerous very fine particles of 

 sand, have been dredged by the Investigator in the 

 Andaman Sea. One of these, Masonella patelliformis, 

 H. B. Brady (Fig. 98), dredged in 265 fathoms, attains 

 a diameter of more than half an inch. 



