638 



s. GOTO 



" Three furrow aud two or tlirec; 

 ac'tinal adanibulacral spinelets, long- 

 est fm-row aud actinal spinelets equal 

 to or exceeding' two adambulacral 

 plates with suture." 



" Frequently four furrow aud four 

 or five'^ actinal adamlmlacral spine- 

 lets ; 1< )Ugest actinal and furrow 

 spinelets loss than two adanibulacral 

 plates with suture." 



I have examined many specimens of this species, among 

 which there are some 4 -rayed and 6 -rayed individuals, but I 

 have yet to see specimens with more than 6 rays. The radial 

 ratio appears to be subject to a good deal of variation, as may be 

 seen from the following table, in which tlie specimens have been 

 taken at random from among large numbers in my hands. 



1) " These numbers refer to specimens 40 mm. or more mnjor radius." 



