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have basal ray directed downward and paired rays standing out 

 nearly at right angles from it. 



/Spicules. — Dermal triradiates (a) sagittal. All rays nearly equally 

 thick, slightly irregular in outline. Basal ray straight, generally 



Fig. 10.— Leucandra kurilensis. a, dermal triradiates. h, tdbab triradiates. 



C, GASTRAL triradiates. d, OXEA. e, triradiates of oscular margin. /, LINEAR 

 SPICULES op oscular MARGIN. All X 150. 



shorter than paired rays, 120-170/x long and 20ix thick at base. 

 Paired rays usually equal, widely diverging, nearly straight or 

 slightly curved backwards, 190-290/x long and 20/* thick at base. 



