Jordan and Evermann. Fishes of North America. 2571 



barb showing that the spine is serrate ; base of first dorsal equals length 

 of snout; interspace between dorsals exceeding length of first dorsal base 

 by \ to | length of latter. Vent immediately in advance of origin of anal, 

 under middle of interspace between dorsals ; dorsal low and inconspicuous 

 and the anal higher, as usual in this group; pectorals very slender, !& in 

 length of head; outer ventral ray filamentous, reaching third or fourth 

 anal ray. Scales mostly lost, the few remaining on head either entirely 

 smooth or bearing a single median keel with 1 or 2 low spinous points ; those 

 on body without spines, either entirely smooth or showing traces of a low 

 median keel ; 6 scales in an oblique series between lateral line and middle 

 of base of dorsal. Color dark brown, the anterior portion of back and 

 sides with small scattered black spots ; opercles, lower side of head includ- 

 ing gill membranes and ventral area black, as are also the mouth and gill 

 cavity and the peritoneum. A species with the general appearance, includ- 

 ing the protruding snout, the inferior mouth and comparatively weak den- 

 tition of Nematonurus armatm and N. affinls, but with the dorsals less widely 

 separated, the vent anterior in position, and the scales unarmed, as in 

 Moseleyalongifilis. (Gilbert.) Coast of British Columbia. Two specimens, 

 the longest 150mm., from Station 3342, off Queen Charlotte Islands, depth 

 1,588 fathoms, (nvukoc,, circle; Xsiti^, scale.) 



Nematonurits cyclolepis, GILBERT, Kept. U. S. Fish Comm. 1893 (1896), 458, off Queen 

 Charlotte Islands, at Albatross Station 3342, in 1,588 fathoms. 



1000. NEMATONURUS, Giinther. 



Nematonurus, GUNTHER, Challenger Report, Beep-Sea Fishes, xxn, 124, 150, 1887 

 (armatus). 



Body rather robust, covered with rough, strongly-ridged scales. Head 

 short; mouth small or moderate, more or less inferior; teeth in upper 

 jaw rather strong, in 1 series or nearly so; lower teeth uniserial; mucous 

 cavities small ; pectoral fin inserted low, below upper angle of gill cleft ; 

 ventrals well developed, the outer ray filamentous; long ray of dorsal 

 serrated; space between dorsals long, much greater than length of first 

 dorsal. Deep seas. A well-marked genus, distinguished by its rough, firm 

 scales and the wide space between dorsals, (rrftta, thread; ovpd, tail.) 



a. Depth 6 in length ; scales without distinct median keel. QOODEI, 2946. 



aa. Depth 5f in length; scales with the median keel prominent; suborbital narrow, 



with well-marked mucous partitions. SUBOBBITALIS, 2947. 



2946. NEMATONURUS GOODEI* (Giinther). 



Head 5f; depth 6|; eye 5 in head; snout 4f; interorbital width 4^; 

 postorbital part of head 8|; first dorsal II, 8 or 9; second dorsal 105; A. 

 110; P. 20; V. 10; scales 7-150-18, small, strong, free portions covered by 

 series of small vitreous spines arranged in about 6 rows; no specialization 

 of the central row, though the median spine at margin of scale projects 



* By some inadvertence this species is recorded by Goode & Bean as a Hymenocephalus 

 (Oceanic Ichth.,407). On p. 408 it is said to be a Nematonurus. It has obviously nc 

 affinity with Hymenocephalus, and is, in fact, an ally of Nematonurus armatus. 



