J.\P.\NESE ASTEROIDEA. 633 



the one at the mouth end is usually larger than the rest. On 

 the actinal face of each mouth-plate there may be one or two 

 short, thick spines forming the continuation of the outer spines 

 of the adamhulacral plates. 



The nearly circular madreporic plate is very distinct and is 

 covered with indistinct fine grooves. 



In the larger specimen (PL XVIII, fig. 270, 271) the carina! 

 spines are very large and distinct, but the plates themselves are 

 less distinct than in the smaller specimen, the number of carinal 

 spines varying between seven and nine for each arm ; and in 

 addition there are two similar spines close to the anus. Of the 

 lateral series of plates there are four on either side in each arm, 

 two of which extend to the tip of the arm, the third about one- 

 half and the last about one-fourtli as far. The madreporic plate 

 is very conspicuous and elliptical in outline. The dorsal plates 

 are relatively small, the membranous interspaces larger than 

 in the smaller specimen, and the papular pores are much more 

 numerous, there being as many as twenty in the larger groups. 

 The superomarginal spines are longer and more finger-shaped 

 than in the smaller specimen. 



On the ventral side there is nothing noteworthy, except that 

 none of the inferomarginals bear spines. The pedicellarise are 

 very few if not entirely absent. 



One small specimen in S. C. ; one larger specimen in F. B. 



