THE APODOUS HOLOTHURIANS 163 



in other members of the genus — more or less yellowish brown, brownish red, or 

 dark violet, according to the individual ; the color of the body varies evidently 

 with the development of the phosphatic deposits; the caudal appendage is 

 always white or whitish. 



Distribution. — Eeported from New Guinea (Lamport) ; Andaman Sea 

 (Walsh); four of the "Siboga" stations in the East Indies (Sluiter), and six 

 of the "Investigator" stations in the Gulf of Bengal and near Ceylon (Koehler 

 and Vaney). 



Remarks. — Although Walsh considered this species near to antarctica, and 

 Sluiter, and Koehler and Vaney regard it as nearly related to grminlata, it ap- 

 pears to be quite distinct from either, and well characterized by the presence 

 of the phosphatic deposits and the peculiar but well-formed tables of the 

 caudal region. Considering the meagerness of Walsh's description and the ab- 

 sence of any figures, it is not strange that Sluiter failed to recognize andaman- 

 ensis in his East Indian specimens. There can be little question, however, of 

 the identity of the two forms; nor can there be much doubt that the little 

 "Trochostoma" from New Guinea brought home by the "Gazelle" and con- 

 sidered by Lampert ('89) to be antarctica, really is andamanensis . 



MOLPADIA SIMILIS. 



Plate X, Fig. 16. 



Anhjrodcrma simile Theel, 1886a, p. 40: pi. xi, fig. 2. Calcareous particles, pi. ii, 

 fig. 5. 



Length. — 100-110 mm. 



Color. — Dirty gray and yellowish brown. 



Distribution.— Reported only from Yokohama, Japan, 621 m. (Theel). 



Remarks. — This is one of the species known from only a single specimen, but 

 it appears to be quite unique, unless indeed it should prove to be the adult of 

 rorctzii; the small size of the tables is a striking point of resemblance between 

 the two. 



MoLPADIA AFFINIS. 



Anhjroderma afflne Danielssen and Koren, 1879, pp. 133-137; pis. v and vi, figs. 

 22-28. 



Length. — 50-75 mm. 



CoLOfi.— Gray or grayish green ; the oral disc and caudal appendage whitish. 



Distribution.— Reported from north of Norway (Danielssen and Koren) ; 

 Kara Sea (Clark, antea) ; and Caribbean Sea (Theel). The range possibly coin- 

 cides with that of oolitica. 



Remarks.— I was at first inclined to consider this species as simply a form 

 of oolitica or possibly arctica, but the calcareous tables "-^em to be quite 



