32 ART. 5. — SANJI HÔZAWA : 



Paired rays much diverging, almost of equal length, slightly curved, 

 90-170 // long and W-20 ft thick. 



Gastral triradiates (textfig. 6, g, h). — Sagittal. Basal ray usually 

 much longer and slightly thinner than paired rays, quite straight, 

 tapering gradually from base to sharp point, 170-230 /^ long and 

 8-12 // thick. Paired rays almost of equal length, straight or 

 shghtly curved, gradually and sharply pointed, 90-150 ,« long and 

 12-16/^ thick. The spicules closely resembL? dermal triradiates 

 but may be distinguished from these by the larger size, by the 

 basal ray being thinner than paired rays, and by their more 

 regular arrangement. 



Gastral quadriradiates (textfig. C, i,J). — Similar to gastral tri- 

 radiates, except in the presence of apical ray. Apical ray very 

 short, thinner than either of the basal or i)aired rays, slightly 

 curved and gradually sharp-pointed, 40-60 /^ long and 6-8 /^ thick. 



Large dermal oxea (textfig. 6, k, I, m). — Strongly developed, 

 spindle-shaped, a little irregular in outline, generally broadest at a 

 point nearer proximal than distal end and tapering towards both 

 sharply pointed ends. They are more or less curved, and are of 

 very variable length, 0.49-2 mm. long and 30-90 [j- thick. 



Trichoxea of dermal cortex. — Hair-like, straight or shghtly 

 curved, generally with the free end broken off, 2-4 « thick. A 

 large example measured 700 /^ in length and 2 /^ in tliickness. 



Trichoxea of oscular margin. — Nearly like those of dermal 

 cortex. Hei'e again, the free end is usually found broken off. An 

 example, incomplete at one end, measured 240 /^ in length and 4 // 

 in thickness. 



Note. — I have referred this new species to the genus Heteropia, 

 chiefly because of the presence in dermal cortex of the large oxea 

 running nearly parallel with the surface. Remarkable is the non 



