The Echinoderm Fauna of South Africa. 321 



the upper ones blunt and squarish. First under arm-plate moderate, 

 hexagonal, a trifle wider proximally than distally; second phitc 

 large rather axe-head-shaped but much wider than long: succeeding 

 plates somewhat oblong, wider than long, but soon becoming squar- 

 ish, distal corners rounded; all the under arm-plates are separated 

 from each other more or less widely. Side arm plates not large or 

 with prominent spine ridges, meeting both above (except at base of 

 arm) and below; the basal plates bear 7 or 6 smooth, pointed spines, 

 the uppermost longest and equal to at least two arm segments; on 

 the first segment outside the disk, the rows of spines are closely 

 approximated dorsally and on the second segment they are fairly 

 close but the number of spines then drops to 5 and they do not 

 approach each other dorsally; the lowest spine is smallest and blunt- 

 est and scarcely equals one arm-segment. Tentacle-scale single, 

 blunt and spine-like. - Colour (dry): pale brown, lightest below; 

 disk with faint indications of white variegation and arms very 

 faintly banded on the upper side distally. 



P.F. 12983. Gonubie River, N. W. by W. 3 / 4 W., 3 miles, 20 

 fms. Brk. sh. 1 specimen; small adult. 



P.F. 13193. Cove Rock, N.W. by N., 6 miles, 43 fms. Brk. sh. 

 and r. 1 specimen; small adult. 



P.F. 13240. Cove Rock, N.E. 3 /,, E., 5 miles, 43 fms. St. and 

 brk. sh. 4 specimens; small adults. 



P.F. 13280. Cove Rock, N.E. by E., ','2 E., 4 miles, 22 fms. 

 R. and brk. sh. 1 specimen; small adult. 



P.F. 13455. Sandy Point, N.E. by N., 6 miles, 51 fms. Brk. sh. 

 and st. 1 specimen ; adult. 



P.F. 13619. Great Fish Point, W. by N., 5 miles, 22 fms., R., 

 crl., st. 1 specimen; adult. 



P.F. 13801. Riet Point, N.E. by E., 2 miles, 23 fms. S. and st. 

 12 specimens ; adult. 



P.F. 15502. False Bay, 22 fms. S. and sh. 1 specimen; small 

 adult. 



P.F. 15627. False Bay, 17-27 fms. R, 2 specimens; adult and 

 young. 



P.F. 16231. False Bay, 22 fms. Brk. sh. 1 specimen; small 

 adult. 



Bathy metrical range, 17-51 fms. 



Holotype, South African Museum no. A 6437. P.F. 13801. 



This is a well marked species in a genus of perplexing specific 

 lines and is not near enough to any species yet known to cause 

 any difficulty. The long approximated spines at the base of the 



