252 



Verrill, N'otes on Radiata. 



pointed, diminishing in size outwardly and blending with the teeth- 

 papilla3, which are irregular in number ; mouth-papillae small, 6 or 8 

 on each side, crowded toward the teeth, leaving the corners of the 

 mouth entirely destitute of them ; those farthest from the teeth are 

 much the smallest ; madreporic plates prominent, transversely ellipti- 

 cal, twice as long as broad ('IS inch by "6), situated at the edge of 

 the interradial spaces. The projecting angles of the mouth and a 

 space on the lower side of the arms within the disk and bordering 

 the interradial spaces all around, is covered with coarse rounded 

 granulations like those of the upper surface. The space around the 

 mouth and connecting with the median area of the arms is granulated 

 like the lower side of the arms. Color, in alcohol, deep umber ; when 

 dry, yellowish brown. 



The largest specimen, desci'ibed above, measures as follows : 

 From angle of mouth to 1st fork of arms, •72 of an inch. 



From center to edge of interradial space '7. Width of rays, at 

 base lieneath, '4 ; of 1st forks '3 ; of 2nd forks "15 ; from outer side of 

 madreporic plate to end of teeth '4 ; to corner of opposite mouth-slit 

 •62 ; between corners of adjacent mouth slits '22. 



A younger specimen, "25 inch from center to edge of interradial space 

 and '3 to end of radial ribs, has the disk prominently five lobed, the two 

 radial ribs of each arm being separated only by a shallow groove. 

 The first fork of the arms is considerably outside of the disk, '52 of an 

 inch from center of mouth. The arms divide six times. The up- 

 per surface is uniformly and coarsely granulated, similarly to that of 

 the larger ones. • The lower surface is more uniformly granulated, the 

 disk and region aroimd the mouth presenting nearly the same ap- 

 pearance as the lower sides of arms. The mouth-papillge are more 



