164 THE APODOUS HOLOTHUKIANS 



unique, and the species is certainly as valid as many others in this perplexing 

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

 exactly what the northern distribution of affinis is. 



MOLPADIA RORETZII. 



Haplodactyla roretzii v. Marenzeller, 1877, p. 29 ; pi. iv, fig. 1. 



Ankyroderma roretzii v. Marenzeller, 1881, p. 124. Calcareous particles, pi. iv, 



fig- 4. 



LENGTH. 55 mm., of which the caudal appendage is 12; diameter about 30 

 mm. 



COLOR. Dark violet-brown, with the caudal appendage white. 

 DISTBIBUTION. Reported only from Japan (v. Marenzeller). 

 REMARKS. 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 prove to be identical. Theel ('86) is undoubtedly right in consider- 

 ing the tables with a single, and always broken, spire figured by von Marenzeller 

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

 found. 



MOLPADIA AMOBPHA. 



PLATE XIII, PIGS. 14-22. 



Molpadia amorpha Clark (antea, p. 31). 



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

 mm. 



COLOR. Gray, more or less spotted or blotched with dark purplish, 

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



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

 350m. (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 TURGIDA. 



Molpadia turgida Verrill, 1879a, p. 473. 

 Trochostoma turgida Verrill, 1885&. 

 Trochostoma turgidum Theel, 1886a. 



LENGTH. 90-125 mm. 



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



DISTRIBUTION. 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). 



