ACTINOPODOUS HOLOTHUKIOIDEA. 27 



be a permanent feature of the body eonfiguration. However, it is 

 lost in the preserved specimens, Vcntrally, the median ambu- 

 lacrum is entirely naked. It was already marked, when the 

 sketch was made, by a deep groove as in the ligures. A zone 

 of light yellow pedicels, forming two irregular rows, was found on 

 each side inside the scries of marginal papillae. The pedicels 

 wx^re ascertained by means of sections to belong to lateral am- 

 bulacra. Anteriorly, they stopped at the neck-like constriction, 

 and did not extend into the head-hke portion. 



Dor sally the papillae, which w^ere all of a fairly uniform size 

 smaller than the marginal papillae, appeared to be irregularly 

 distributed in two longitudinal zones, each corresponding to 

 one of the dorsal ambulacral fields. In each zone, the papillae 

 were in three rows, standing more or less regularly alternate 

 in their positions. 



The mouth was distinctly ventral. In it 20 tentacles, each 

 with transparent stem and brown crown, were found. They 

 seemed all uniform in size, i.e., there w^ere none marked as ventral 

 by their small size. The anus was distinctly dorsal in position 

 and circular in shape, with somewhat raised rim. 



The color of the animal was of a carmine red, deepest in 

 the median dorsal area. It is possible that the whole body was 

 of tili s deep shade when alive. 



Genital bundles two, red-colored and branched. Calcareous 

 ring in one specimen not distinct : in its place there seemed to 

 be some calcareous deposits, but no w^ell formed pieces. In 

 another specimen the ring was imperfect and weakly developed, but 

 the pieces could be made out as shown in textfig. a. Polian vesicle 

 one, long, cylindrical, 4 cm. long. Its tip not specially colored. Xo 

 tentacular ampullae. Respiratory trees tolerably well developed, 



