FAMILY CARAPIDAE — SCHULTZ 391 



5a. Greatest depth of body l^i to IJi times in length of head; vertebrae 



more than 100 - _ Carapus Rafinesque 



56. Greatest depth of body equal to head length; vetebrae 90 or fewer. 



Onuzodon " Smith 

 Genus JORDANICUS Gilbert 



Jordanicus Gilbert, Bull, U. S. Fish. Comm., vol. 23 (1903), pt. 2, p. 659, 1905 

 (type species, Fierasfer umhratilis Jordan and Evermann) . 



JORDANICUS GRACIUS (Bleeker) 



Plate 120,F 



Oxybeles gracilis Bleeker, Nat. Tijdschr. Nederl.-Indie, vol. 11, p. 105, 1856 



(type locality, Banda). 

 Fierasfer umhratilis Jordan and Evermann, Bull. U.S. Fish Comm., 1902, vol. 22, 



p. 206, 1903 (type locality, Hawaiian Island). 



SPECIMENS STUDIED 



Bikini Atoll; Enyu Island, March 13, S-46-6, Brock, 1 specimen, 154 mm* 

 total length. 



In addition I have studied 4 other specimens; USNM 65884, Tahiti; USNM 

 115402, Tau Island, Samoan group; USNM 122812, Philippines; and the holotype, 

 USNM 50656, of F. umbratilis, Hawaiian Islands. 



Description. — Body elongate, tapering to a point posteriorly; head 

 about 9 times in total length and greatest depth about 18 times; anus 

 slightly in front of a vertical line through pectoral fin base; anal origin 

 just behind anus; dorsal fin beginning so gradually that the exact point 

 of origin is not clear, but at about two headlengths behind snout tip; 

 median fins probably not fully continuous around tip of tail; lateral 

 line present and running a course along the midlengthwise axis of body; 

 gill membranes joined together far forward, and free from the isth- 

 mus; gill opening restricted to below upper edge of pectoral fin base; 3 

 free gill arches, the opening behind the fom"th arch small; postorbital 

 length of head 1.6 in head; greatest depth of body twice in head 

 length; pectoral fin present, 3.2 in head and 1.9 in postorbital length of 

 head; eye 2}^ in postorbital length of head; maxillary reaching past 

 orbit, from tip of snout to rear edge of embedded maxillary 2% in head 

 and Iji in postorbital length of head; teeth in both jaws and on pala- 

 tines minute, in one or two rows; two or three slightly enlarged conical 

 teeth on vomer; none of the gill rakers notably more elongate than 

 others, all very short; no pungent spine on opercle. 



Color in alcohol. — Background color pale, with numerous brownish 

 pigment cells more or less arranged in narrow vertical bars anteriorly; 

 posteriorly the dorsal and anal fins are black, this color not extending 

 forward beyond one fourth of the total length. Peritoneum dusky. 



2« Onuxodon Smith, Ann. Mag. Nat. Hist., ser. 12, vol. 8, pp. 403, 404, 1955 (type species, Carapus parvi- 

 brachium Fowler). 



422142—60 26 



