THE APODOUS HOLOTHUBIANS 167 



MOLPADIA PEBFOEATA. 



Plate X, Fro. 19. 

 Anl-yrodcrma perforata Sluiter, 1901, p. 121. Calcareous particles, pi. x, fig. 8. 



Length. — Up to 140 mm., of which the tail is about one-seventh; diameter, 

 30 mm. 



Color. — Grayish; in mature specimens, with red-brown spots. 



Distribution. — Eeported only from four "Siboga" stations in D. E. I. 

 (Sluiter). 



Remarks. — This appears to be one of the species in which anchors are pres- 

 ent even in adults. The rosettes are made up of 3-5 racquet-shaped rods, which 

 are widened at the free end and are pei'forated throughout. The colored phos- 

 phatic deposits are said by Sluiter to be absent in the specimens 40 mm. or less 

 in length. The form of the tables and supporting rods seems to be very char- 

 acteristic. 



MOLPADIA PAUPERA, 



Trochostoma pauperum Koehler and Vaney, 1905, p. 93. Calcareous particles, pi. 



XIII, fig. 23. 

 Trochostoma ecalcareum Koehler and Vaney, 1905, p. 94. Calcareous particles, pi. 



XIII, fig. 24. 

 ? Anl-Jjro derma musculus undulatum Koehler and Vaney, 1905, p. 99. Calcareous 



particles, pi. xv, fig. 13. 



Length.— 68-75 mm., of which the very short tail is less than one-twelfth; 

 diameter, about 30 mm. 



CoLOB. — Clear gray or grayish, with the tail reddish or violaceous ; the skin, 

 on its inner surface, is said to be dark violaceous. 



Distribution.— Eeported only from "Investigator" stations 279 (540 m.) 

 and 280 (803 m.). Gulf of Bengal; perhaps also station 250 (800 m.) (Koehler 

 and Vaney). 



Remarks.— This is apparently a species much like oolitica in the rapid loss 

 of calcareous deposits and excessive development of the phosphatic bodies. The 

 supporting rods of the tail are very characteristic and it seems quite possible 

 that the small Ankyroderma reported by Koehler and Vaney from station 250 

 as a variety {und^datum) of musculus is really the young of the present species. 

 There appears to be no good reason for separating ecalcareum from paupera- 

 tum, as only one specimen was taken, and the absence of deposits may have been 

 accidental. 



