Indian Deep-sea Asteroidea. 105 



on each side of this row are six (seven in the interbrachia, five 

 at the end of the rajs) verj close parallel rows of smaller 

 plates, the lowest row articulating with the adambulacrals ; 

 these plates, which also fall into transversely parallel series, 

 are rather distantly covered with capillary spinelets, the central 

 one of which in each plate (except in the row immediately 

 adjoining the large mid-radial series) becomes a long slender 

 spine that gradually increases in size in each successive row 

 from the abactinal to the actinal surface. The narrow 

 intervals between the angles of neighbouring plates give 

 passage (except between the two lowermost rows of plates) 

 each to one papula, and (on the plates) between the papulse 

 is a rather large pedicellaria. 



The adambulacral plates are short and do not extend far 

 upwards within the furrow ; each plate bears on its actinal 

 edge two transversely placed spinelets and occasionally a 

 pedicellaria, and every alternate plate has a prominent intra- 

 ambulacral ridge on which is borne a row of three spinelets, 

 the innermost being furnished with a cluster of eight small 

 pedicellariee, and the one next the innermost with a single 

 large pedicellaria. The mouth-plates are armed with large 

 needle-like spines. 



Tube-feet quadriserial. 



Madreporiform plate large, tumid, and conspicuous, with a 

 coarse peach-stone sculpture. 



Colour in life salmon-red. 



Laccadive Sea, 1200 fathoms, coral and Olohigerina-oozQ. 



This species is very like Z. Barathri^ from which it is easily 

 distinguished, (i.) by the flattened disk very definitely 

 delimited from the bases of the rays ; (ii.) by the large salient 

 madreporiform plate ; and (iii.) by the large spinelet borne 

 centrally on every plate except the basal interradials and the 

 plates of the row immediately adjoining the mid-radial row 

 on each side. 



40. Zoroaster angulatus, sp. n. 



Rays 5. li=12 to 13 r. R = 148 millim. in the 

 type specimen. 



Disk small, high, flat-topped ; rays long and tapering, 

 high, compressed, and strongly keeled abactinally. 



Abactinal surface of disk with close-set, large, tumid, 

 stellate primary radials and basals surrounding a very large 

 tumid dorso-central plate and a ring of small depressed 

 radial under-basals ; all the plates bearing distant capillary 



Ann. & Mag. N. Hist. Ser. 6. Vol. xi. 8 



