G42 s. GOTO : 



towards the centre. The principal plates bear granuliforni 

 spinelets, which are larger than those oi the accessory plates, and 

 may vary anywhere between 40 and 20 or less according to the 

 size of the plate. The accessory plates are very much smaller 

 than the principal plates, are simply round or at most elliptical 

 in oubline, and fill up the spaces between the principal plates. 

 They bear granuliforni spinelets which may vary in number from 

 half a dozen to fifteen or more according to the size of the 

 plate, and which are sufficiently smaller than those of the 

 principal plates to make tlie distinction of the two orders of 

 plates at once apparent without denuding the plates of the 

 paxillar spinelets. It may be remarked that there are also some 

 plates which are intermediate in character between the two. 



Madreporlte. — The madreporite is large and conspicuous and 

 round or slightly elliptical in outline. The surface is perfectly 

 fiat or very slightly concave and bears a largo number of general- 

 ly radiating grooves. 



The colour of this species has been accurately described by 

 DÖDERLEix, and it may be added that the relative area of the 

 dark blue and cinnabar red portions may vary to any extent be- 

 tween the two extremes of complete rufism and cyanism, so that in 

 some cases the species may be distinguished into two colour varie- 

 ties. The colour of the actinal side appears to be nearly constant. 



The papulœ are found singly all over the dorsal side of the 

 arms to their tip and, in the interradial areas, as far out as the 

 distinction between the two orders of plates above mentioned is 

 apparent. 



This species is very widely distributed in Japan, being found 

 in Hokkaido, both on the Pacific coast and the Japan Sea side 



