450 s. GOTO : 



usually b3 distiuguished two series of ossicles iu each arm, the 

 inner of which extends to the last tubercle, but the outer ter- 

 minates at or before the penultimate one. These ossicles, as well 

 as the depressed ridges of the central pentagon, and the spaces 

 between them are entirely covered over with rounded or polygonal 

 granules ; the papular pores are confined to the inter-ossicular 

 spaces. The individual pores are small but very distinct and 

 impart a punctured appearance to the abactinal side. Each pore 

 is usually guarded by a few exceedingly small, short spines. 



There are two forms of pedicellariae on the abactinal side. 

 The more easily observable form is that of small forcipiform 

 pedicellariae, which are very numerous, especially in the poriferous 

 areas, but are also jDresent on the ossicles (PL XV, fig. 235). They 

 project above the general surface and look like so many small 

 prickles. The other form is that of more or less transversely elon- 

 gated pedicellariDß, similar in form to those of the ventrolateral 

 plates but smaller, vrhich are less numerous than the other form 

 and are confined to the surface of the ossicles (PI. XY, fig. 236). 



Madreporite. — The madreporic plate is tolerably large, nearly 

 elliptical in outline, and is situated at the enter margin of the 

 central pentagon, in the centre of the quadrangular area formed 

 by two of the adcentral tubercles and one of their accessory 

 tubercles. The surface of the plate is covered with inconspicuous 

 radiating furrows. 



Terminal plate. — The terminal plates are relatively very small, 

 rounded in form, and entirely covered over with flattened gran- 

 ules exactly similar to those of the marginals. 



Locality. — Kyamu-Saki, Okinawa Island ; littoral. 



Specimen in S.C. 



