Indian Deep-sea Dredging. 439 



Actiiial interradial areas large, witli an irregular network 

 of unequal ])latc3 beneath the smooth coriaceous membrane. 

 A symbiotic Ch{cto])0(l is often found on the interradial areas 

 on which also it often lays its eggs. 



Madreporiform body small, somewhat sunken, situated 

 almost in the centre of an intcrbrachial arc- 

 Anal aperture small, subcentral. 



Tube-feet in a double row, their tips ending in a sucker. 



Colour in the fresh state chestnut-brown. 



From Station 115, 188 to 220 fathoms. 



This remarkable species has been frequently found by us in 

 the Andaman Sea at about 250 fathoms. 



Family Brisingidse. 

 Brisinga, Asbjornsen. 



20. Brisinga insularum, sp. n. 



Allied to B. coronata, Sars. 



Kays 13, long, stout, with ovarian regions much inflated, 

 and the transverse calcareous ridges well developed. Disk 

 comparatively large. 



Ambulacral tube-feet separated by a pair of horizontal 

 spines. 



Colour in the fresh state bright cinnabar-red. 



Station 108, 1043 fathoms. 



21. Brisinga bengalensis, sp. n. 



Rays 14, long, slender, with hardly conspicuous ovarian 

 inflations, and little developed transverse calcareous ridges. 

 Disk small, margin strongly bevelled, depressed abactinally. 



Ambulacral tube-feet separated by a pair of horizontal 

 spines. Mouth-spines very long and broad, dagger-shaped, 

 closely felted with pedicellarite. 



Colour in the fresh state bright cinnabar-red. 



Station 112, 561 fathoms. 



22. Brisinga andamanica, sp. n. 



Rays 15, long, slender, with hardly conspicuous ovarian 

 inflations, and transverse calcareous ridges little developed. 

 Disk of moderate size. 



Ambulacral tube-feet separated by a pair of horizontal 



