ACTiNoroDors iiOLOTirritiuU'EA. 69 



Description : — Tentacles 'JO, small, [.engtli of l»0(ly in life ea. 

 ;)0 cm. ; in alcohol quite LS cm. < 'olor markings very characteristic : 

 dorsum and ventrnm very ditierently colored. The ground color 

 of the former, yellow to brown; on this, twu broad dark-ljroAvn 

 transverse bands cross the whole breadth of the dorsum. One of 

 these is at about J — \ of the body length from the anterior end, 

 and is over 2 cm. in breadth ; the other is at about the same 

 distance from the posterior end and is of about the same l)readth. 

 Sometimes the band may not entirely cross the whole width of 

 the body. The ventrum is lighter than the dorsum, and varies 

 from a uniform brown to almost a white. 



Ambulacral appendages very numerous, uniformly distributed 

 in the ambulacra as well as the interambnlacra without any 

 regular arrangement, on both the dorsum and the ventrum. 

 Dorsal appendages have end-plates almost as well developed as 

 those of the ventrum. Hence all must be considered as pedicels. 

 Except near the anterior and posterior ends I. can not detect a 

 single papilla. In hfe, however, the dorsal pedicels may appear like 

 papillae ; for in my notes on the living animal, I put tlown 

 " Dorsal surface papillae only. Small end-plates ?" There are no 

 large supporting rods, but there are delicate X-shaped spicules, 

 which are somewhat kirger than the calcareous bodies in the 

 body wall. Some of these have long branches at both ends : 

 others are more rod-like with the ends slightly bifurcated. There 

 are all intermediate stages between these. 



Calcareous deposits are very much as in II. marnwrala. In 

 the dorsal perisome, they consist almost entirely of delicate 

 rosettes of -20—25/^ (texttig. 15 h). They start with the X-shape, 

 but the Ijranches at the ends divide dichotomously 2 — 1 times 

 and the whole looks like a delicate liligree-work. In the 



