ECHINODERMATA — CLARK. 543" 



long,^ Avidely separated (even first and second) from each other ; 

 first is widest proximally, but others are all widest distally. Side 

 arm-plates large, somewhat flaring, meeting broadly above and 

 below ; each plate carries four (on basal joint five) smooth spines, 

 the uppermost much the longest and stoutest ; these spines are 

 slender and terete, blunt or somewhat acute, and the uppermost 

 on basal joint (where the two series of opposite sides meet) is as 

 long as two and a half arm-joints. Tentacle-scale single, rather 

 large, flattened, but narrowed and often spiniform. Colour 

 uniform light brown, lightest beneath. 



2 specimens from Station 35. OS Port Hacking, 22-38 

 fathoms ; sandy. 



10 specimens from Station 55. Ofi" Crookhaven River^ 11-15 

 fathoms ; sand to rock. 



29 specimens from Station 57. Ofi" Wata Mooli, 54-59 

 fathoms; all mud. 



This little species, though such a small member of a large and 

 perplexing genus, is easily recognised by the peculiar arrange- 

 ment of spinules on the disc. I know of no species with which 

 it can be confused. 



OPHIOPEISTIS AXIOLOGUS,"° sp. nov. 



(Plate liii, figs. 1-3). 



Diameter of disc, 3 mm.; length of arm, 6 (?) mm. Disc 

 covered by coarse scales, each of which carries one or two short,. 

 thorny stumps, which are a little expanded at the top, and bear 

 a crown of three or four very short teeth there. Radial shields 

 are scarcely to be distinguished, though a pair of plates, widely 

 separated, somewhat larger than the disc scales and without 

 stumps, can be seen at the bases of some of the arms. Upper 

 arm-plates triangular, with a sharp proximal angle, widely 

 separated from each other. Interbrachial spaces below covered 

 by stump-bearing scales, similar to those of disc. Oral shield' 

 very small, wider than long. Madreporic shield large, and 

 swollen with four conspicuous pores. Adoral plates small, about 

 as wide as long. Oral plates large, but outlines very indistinct. 

 Oral papillse about eight, of which the distal three or four are 

 remarkably long and sharp, and serve as tentacle-scales on the 

 outer side of the first pore ; the jaw ends in one or two infra- 

 dental papillse ; inner side of first pore guarded by four or five 

 shorter, but sharp, papillee ; these may be so reduced as to be 



''^ d^ioXoyos — worthy of mention, remarkable. 



