164 THE APODOUS HOLOTHURIANS 



unique, aud the siDeeies is certainly as valid as manj^ others in this perplexing 

 genus. As Ludwig ( :00fl) does not distinguish it from jeffreysii, we cannot tell 

 exactly what the northern distribution of affinis is. 



MOLPADIA EORETZII. 



Haplodactyla roretzii v. Marenzeller, 18T7, p. 29; pi. iv, fig. 1. 

 Anhyroderma roretzii v. Marenzeller, 1881, p. 12-1. Calcareous particles, pi. iv, 

 fig. 4. 



Length. — 55 mm., of which the caudal aj^pendage is 12; diameter about 30 

 mm. 



CoLOK. — Dark violet-brown, with the caudal appendage white. 



DiSTEiBXjTioN. — Reported only from Japan (v. Marenzeller). ' 



Eemaeks. — This is another species known from only a single specimen, and 

 while it appears to be distinct from similis, it will not be at all surpris- 

 ing if they jirove to be identical. Theel ('86rt) is undoubtedly right in consider- 

 ing the tables with a single, and always l)roken, spire figured by von Marenzeller 

 as the basal portions of the anchors, whieh von Marenzeller seems not to have 

 found. 



MoLPADIA AMOEPHA. 



Plate XIII, Figs. 14-22. 

 Mulimdia ainorpha Clark (autea, p. 31). 



Length. — 100-115 mm., of which the tail is only one-tenth; diameter 30-40 

 mm. 



CoLOE. — Gray, more or less spotted or blotched with dark purplish, 

 especially anteriorly, where the color may.be nearly uniformly dark. 



Disteibution. — Reported only from off the southern coast of Chile in 200- 

 350 m. (Clark). 



Remarks. — This species seems to be quite constant in its characters, so far 

 as adults are concerned. As no young specimens are available, it is not known 

 whether anchors and plates ever occur. 



MoLPADIA TUKGmA. 



Molpadia turgida Verrill, 18T9a, p. 473. 

 Trochostoma turgida Yerrill, 18856. 

 Trochostoma turgidum Theel, 1886a. 



Length. — 90-125 mm. 



CoLOE. — Reddish or purplish brown; skin thin, semi-translucent. 



Disteibution. — Reported from Massachusetts Bay, 72-180 m., Gulf of 

 Maine, Casco Bay, Bay of Fundy, off Nova Scotia, and Gulf of Saint Law- 

 rence (Verrill). 



