256 s. GOTO : 



to be somewhat hour-glass shaped, the top of the tabulum being 

 especially well rounded (PI. VIII, fig. 139). The paxillaî are 

 largest on the madreporite, where they are mostly flattened from side 

 to side, so that on a top view they appear more or less elhpsoidal ; 

 they are not, however, so tall as in the other parts of the body. 

 Outside of the madreporite the largest paxillœ are found in the 

 more central part of the disk and along the carinal ridges of the 

 arms. Near the end of the arms and the marorin of the bodv 

 they are smaller. The coronal spinelets are very fine, pointed and 

 slender ; there is no distinction of centrals and peripherals, but 

 those borne along the periphery are usually shorter. The spinelets 

 are close together, so that the general shape of the corona is 

 that of a rounded cone (PI. VIII, fig. 139). On one of the larger 

 paxillae near the centre of the disk 45 coronal spinelets were count- 

 ed. There is no area of small paxillse at the centre of the disk. 

 The papular pores are very numerous and comparatively large, there 

 being sometimes as many as four or five in an area enclosed by 

 any four paxillae ; so that in some places the dorsal wall of the 

 body presents a reticulated appearance. The papulae are distributed 

 almost uniformly on the whole abactinal surface of the body. 



Madreporite. — The madreporite is very large, being bout 12 mm. 

 in diameter in the specimen here described, depressed, circular, of 

 very uneven surface, the larger elevations and depressions being 

 arranged radially. The whole surface is traversed by very 

 minute grooves. It is situated a little nearer the margin than the 

 centre of the disk. It bears on its surface about twenty large 

 paxiUœ, and is not conspicuous in an entire view of the animal. 



Terminal plate. — The terminal plate is relatively very small, 

 and nearly round. 



