348 s. GOTO : 



the valves arc perhaps slightly more angular (Pi. XEII, figs. 203, 

 207, 210). The total number of abactinal pedicellarise is between 

 80 and 90. I have also observed a 3-valvate pedicellaria on one 

 of the abactinal plates. 



The interstitial plates are of various sizo and shape and are 

 either entirely covered with granules or present a very small 

 central naked area. They fill up the spaces between the main 

 plates (PI. Xin, fig. 207). 



The abactinal plates do not sliow any regular arrangement 

 in the disk or arms. 



The anus is subcentral and is surrounded by some coarse 

 granules of a different appearance from those of the general 

 abactinal surface. 



Madreporite. — The madreporite is comparatively large and 

 conspicuous, being much more lightly coloured than the general 

 abactinal surface. It is polygonal in shape and its surface is 

 nearly plain ; the furrows are mostly radiating and comparatively 

 simple. It is nearly as far removed from the centre of the disk 

 as from the margin (PI. XIII, figs. 203, 211). 



Terminal plate. — The terminal plate is nearly elliptical in 

 shape and is conspicuous, being as large as or a little larger 

 than the last superomarginal plate. 



Locality. — I owe my specimen to my friend. Prof. Nozawa 

 of the Fisheries Department of the Tôhoku Imperial University 

 in Sapporo, who collected it in tlie vicinity of Volcano Bay, 

 riokkaido. Colour in alcohol when received umber brown on 

 the abactinal and pale rosy on the actinal side. 



Specimen in S., donated to S.C. 



This species is closely allied to H. lelopclta Fisher, but is 



