180 K. MITSUKUßl : STUDIES OX 



The spire is also reduced mostly to four knobs, but from the 

 most complete ones, I am able to make out that they resemble 

 closely the tables of the group of Siicliopus to which S. varicgahis 

 belongs. There are also C-shaped bodies about 0.08 mm. long, 

 like those in aS^. varlegatus and somewhat larger than those seen 

 in S. cJdorcnoius. They are tolerably numerous. There are also 

 rosettes scattered in moderate abundance. They are mostly smaller 

 than the C-shaped bodies. Large ventral pedicels arc in three 

 distinct rows, of which the middle one is twice as broad as the 

 lateral. On the dorsum, there are large wart-like papillae whose 

 arrangement I can not make out distinctly owing to the distortion 

 of the specimen, but which seem to be confined to the two dorsal 

 ambulacra. The lateral edges (between the dorsum and the 

 ventrum) have only a few large warts distributed widely 

 apart. Numerous smaller papillae seem to be scattered all over 

 the dorsum. On the whole, the specimen seems to agree best 

 with the description of Stidiopm variegatus. 



The specimen from the Ogasawara Is. also probably belongs 

 to this species, although it may possibly represent S. naso or 

 some other allied species. 



The other two lots from Torres Strait can be identified with 

 the species. Of the three specimens examined l)y me, two are 

 quite large, being about 20x10 cm. even in their present con- 

 tracted state. The third specimen is much smaller, being 10 x 

 4.5 cm. In alcohol, the color of the larger specimens is uniformly 

 light brown ; the smaU specimen is also of that color, but shows 

 on the dorsal surface a large patch of a darker shade of brown. 



in all the specimens, papillae raised on comparatively small 

 warts are scattered irregularly over the dorsal surface, in the 

 interambulacral as well as the ambulaeral regions. In the ventrum, 



