ON SOME JAPANESE CALCAREOUS SPONGES. 19 



typical cases, the facial rays are 180-230/^ long and 24/^ thick; 

 the apical ray about 280 ,« long and 24 a« thick. 



Triradiates of oscular margin (textfig. 3, o, p). — Very strongly 

 Siigittal. Basal ray longer and more slender than the paired 

 rays, straight, gradually and sharply pointed, 230-310// long 

 and 8 /^ thick. Paired rays strongly diverging, slightly curved, 

 either gradually sharp-pointed or broadened in the middle and 

 narrowed towards both the base and the pointed end. The oral 

 angles are rather variable. 



Microxea (textfig. 3, q, r). — Nearly straight, symmetrically 

 sharp-pointed at both ends, sometimes with a hastate point at 

 one end, 76-92 ," long and 4 ,« thick, 



Trichoxea of oscular margin (textfig. 3, s). — Very slender, 

 straight, 210-550 // long and 2 /^ thick. 



Oxea of oscular margin (textfig. 3, t, ii, v). — These resemble 

 trichoxea, but are thicker, straight, almost uniformly thick through- 

 out their length; the ends sharply pointed, 110-450 /^ long and 

 6 ft thick. 



Note. — The specimens seem to agree very well in all essential 

 characters with the Australian species first described by Carter 

 mider the names of Hypograntia intusarticulata and H. medioarticu- 

 lata and later referred to Grantessa by Dendy. I am therefore 

 strongly incHned to identify the Japanese form with that species. 



Localities. — Near Port Philip Heads (Carter) ; Watson's Bay, 

 Port Jackson (Dendy) ; Dôketsba and Misaki, Sagami Sea. 



4. Grantessa hasipaiyillata, u. sp. 

 (PI. I., fig. 6 ; PL n., fig. 14 ; textfig. 4). 

 This species is based on a single specimen (Sei. Coll. Spec. 



