392 U.S. NATIONAL MUSEUM BULLETIN 202 Vol. 2 



Ecology. — The specimen from Bikini came from a sea cucumber, 2 

 feet long, with warty brown skin, taken at a depth of about 15 to 20 

 feet, identified by the late Austin Clark of the Smithsonian Institution 

 as Holothuria atra Jager. 



Genus ENCHELIOPHIS Miiller 



Encheliophis Mulleb, Abh. Akad. Wiss. Berlin, p. 153, 1843 (type species, 



Encheliophis vermicularis Miiller). 

 Encheliophiops Reid, Allan Hancock Pacific Exped., Univ. Southern California, 



vol. 9, No. 2, p. 47, 1940 (type species, Encheliophiops hancocki Reid; 



Gorgona Island, Colombia, S. A., in Pacific). 



A comparison of Reid's holotype of E. hancocki with the two 

 specimens from Guam described below does not indicate that two 

 genera should be recognized. Probably there are two species, at 

 least the two should stand until more specimens have been collected 

 and studied. The genus Encheliophiops was based on a small speci- 

 men that still retained some of the youthful features of other carapids 

 such as more slender body and the dorsal and anal fins not being 

 fully continuous around the tail. Other generic characters are listed 

 in the key. 



ENCHEUOPraS VERMICULARIS Miiller 



Plate 120,G 



Encheliophis vermicularis Muller, Abh. Akad. Wiss. Berlin, p. 154, pi. 5, fig. 4, 

 1843 (type locality, Philippines). 



SPECIMENS STUDIED 



Guam: Tumon Bay, June 20, 1945, L. Gressitt, 2 specimens, USNM 124249, 

 95 and 125 mm. total length. 



Description. — Body elongate, eel-shaped, tapering to a point 

 posteriorly; head about 11 or 12 times and greatest depth of body 

 20 to 24 times in total length; anus a trifle behind the rear edge of 

 head; anal fin origin a short distance behind anus; dorsal fin beginning 

 so gradually that its origin is not clear, probably begins 3 or 4 head 

 lengths behind tip of snout; median fins probably not fully continuous 

 around tip of tail; lateral line pores indistinct but apparently along 

 middle of sides; gill membranes joined far forward but free from 

 isthmus; gill opening not extending above middle of side; first 3 gill 

 arches with slits behind, fourth arch imbedded; postorbital length of 

 head 1.4 to 1.5 in head; greatest depth of body 1.8 to 2.1 in head; no 

 pectoral fin; eye 4^ to 6 in postorbital length of head; maxillary not 

 free, reaching past orbit, distance from rear edge of maxillary to tip 

 of snout about 2}^ in head and 1% to 1% in postorbital length of head; 

 teeth in upper jaw very small, conical, one row posteriorly, 2 rows 

 anteriorly; a single row of small conical teeth on lower jaw; palatines 



