THE APODOUS HOLOTHURIANS 183 



Distribution. — Eepoi'ted from Bohol and Cebu, Philippines (Semper) ; 

 Saleyer, D. E. I. (Sluiter). 



Remarks. — There seems very little reason for separating this species from 

 molpadioides, but Sluiter, who has probably studied more specimens of this 

 genus than any other zoologist, considers it recognizable, and we may well de- 

 fer to his judgment until further evidence is in. The reproductive glands are 

 said to be unbranched and the calcareous ring much narrower than in inol- 

 padioides. 



Aphelodactyla hyaloeides. 



IlaplodnciijJa hiialoeides Sluiter, ISSO, p. 345; pi. v. 

 Ilaplodactyla hnaloeides Sluiter, 1880, p. 345 ; pi. v. 



Length. — 35 mm. 



Color. — Colorless and glassy, like Salpa. 



Distribution. — Eeported from Batavia (Sluiter) ; Amoy (Ludwig), and 

 Samana Bay, D. E. I. (Sluiter). 



Remarks. — Although only four specimens of this remarkable species are 

 known, it would appear to be very distinct from any other member of the 

 family. The reproductive organs are well developed, so there is no good reason 

 for considering it immature. Besides the deposits near the cloacal opening, 

 Ludwig found branched rods in the walls of the genital tubes. 



CERAPLECTANA Clark (antea, p. 39). 



Tentacles 10, simple, unbranched, horny and pointed, provided with normal 

 ampullie. Body nearly cylindrical, but tapering posteriorly into a well-de- 

 veloped caudal appendage. Radial pieces of calcareous ring with marked, but 

 not deeply forked, posterior prolongations. Calcareous deposits in the form of 

 irregular branched plates or straight rods, perforated near the middle, and 

 usually with a single, sharp, outwardly directed spine. Phosphatic deposits 

 present. 



The relationships of this curious genus are evidently with Molpadia, as 

 shown by the shape of the body, the calcareous ring, and the deposits in the 

 skin, but the tentacles are very distinctive. Koehler and Vaney ( :05) report 

 a Molpadia from the Gulf of Bengal {elongata) in which only 10 tentacles 

 showed, but they say nothing of the form or structure of those; the use of 

 the word "dix" looks very much like a slip of the pen, as no comment is made 

 on the unusual number. 



Ceraplectana trachyderma. 



Plate XIII, Figs. 5-13. 



Ccmplectana trachyderma Clark (autea, p. 39). 



Length.— Up to 80 mm., of which about one-fourth is tail; diameter, 10- 

 20 mm. 



