1893.] A Alcock — Account of the Deep Sea Collection. 173 



Family Zoroasteridse. 



Zoroaster Wyville Thomson. 

 Fine specimens of (4.) Zoroaster Alfredi and (5.) Zoroaster bara- 

 thri (Ann. Mag. Nat. Hist., Feb. 1893, pp. 102, 103), from the Bay of 

 Bengal, 599 fathoms. 



OPH1UROIDEA. 



Family Astrophytidse. 



Astroschema, Orst. and Ltk. 



1. Astroschema flosculus, n. sp., PI. VIII. fig. 5. 



R=llr-16r. 



The sides and abactinal surface of the disk and arms are covered 

 with granules, — prominent granules and globules being scattered over 

 a finely granular surface, and the actinal surface is covered with an 

 uniform microscopic granulation. 



Viewed from the aboral aspect the disk is rotate-corolla-shaped, 

 being deeply depressed in the centre and consisting of five deep cut 

 petaloid lobes, each composed of a pair of radial plates. There are no 

 mouth papillae or tooth papillae, but there is a vertical row of five 

 large hastate teeth on each mouth segment. 



Rays long, tapering to a lash, simple, and perfectly square in sec- 

 tion, the actinal angles of the square being occupied by the series of 

 paired spine-like tentacle scales, and the abactinal angles by series of 

 prominent clumps of globuar granules corresponding to the tentacle 

 scales, this arrangement emphasing the arm joints and giving the arms 

 a regularly beaded appearance. 



Genital openings nearly vertical, and traversing nearly the whole 

 depth of the disk. 



Mouth tentacles large, the second pair of tentacles without any 

 scale, the third pair with the pairs of scales small. 



Colour, in alcohol, grey ; in life, blood-red. 



From the newly discovered coral bank north of Madras, in 88 

 fathoms. 



ECHINOIDEA. 



SPATANGOIDA. 



Family Cassidulidse. 



Echinolampas, Gray. 



1. EcJmiolampas castanea, n. sp., PI. VIII. fig. 6. 



Test thick, high, bluntly conical towards the greatly excentric 

 abruptly subacumin ate apical system ; sub-pentagonal in tumid ambital 

 outline ; densely felted with short capillary spines, which are larger 



