218 DEEP SEA FISHES. 
upper angle of the opercle, little forward of the bases of the pectorals; 
number of spines usually eleven, rarely ten; second spine smooth, including 
the filament it is three fifths as long as the head. Spines of the second dor- 
sal weak and small; origin of the fin distant from the first dorsal hardly less 
than the length of the latter’s base. Anal origin little farther backward 
than the base of the first dorsal. Ventrals small, first ray with a filament, 
equal in length to the distance from the tip of the snout to the middle of 
the eye, inserted at the lower angle of the opercle. Caudal filamentary 
when complete. In most cases it is truncate at the base, which bears a 
group of rays, of varying number, terminating in a pencil point. The tuft 
on the tail gives a completed appearance to that organ, but the length of 
the caudal section varies greatly ; on six specimens there are respectively, 
58, 70, 76, 81, 103, and 105 rays in the second dorsal, and 61, 74, 78, 83, 
106 and 107 in the anal fins. Only about one in six is entire. Pectorals 
small, more than half as long as the head, inserted a little backward of the 
ventrals or of the origin of the dorsal. Vent close to the anal fin. Scales 
medium, rough with several to five or more spinose ridges which are diver- 
gent backward ; five scales between the lateral lime and the dorsal fin. Py- 
lorie appendages ten. Females of six and one half inches have both ovaries 
developed and filled with eggs that are nearly or quite mature. 
Sides of the muscular regions flesh color to brown, darker on the back, 
with more or less of silver especially on the sides of the body chamber. 
Belly from anal to chin blackish. Entire head translucent (possibly lumin- 
ous), silvery, around eyes and gill openings showing blackish as from within. 
Forward ends of rostral angles blackish. Puncticulations of brown are irreg- 
ularly scattered or grouped everywhere over head and body. 
Station. Latitude. Longitude, Depth, Temperature. Bottom, 
3355 7° 12! 20" N. 80° 55’ W. 182 fathoms py de Bk. G. Sh. 
3389 WONG ASAIN 79° 56’ 30” W. PAO} 48.8° F. Gn. M. 
3391 7° 33/ 40” N. 19° 43/20" Wry ss) “<6 55.8° FF. Gn. M. 
Trachyrhynchus helolepis. 
Trachyrhynchus helolepis Gilb., 1891, P. U. S. Mus., 562. 
Plate G, fig. 2; Plate LI, skull. 
Br. r.'7; D. 11 (11-10), + ca. 113; A. ea. 107; V. 7-6; P. 23. 
Depressed and acute anteriorly ; compressed, narrow and tapering to a 
slender extremity in the posterior half. Head one fifth wider than deep, 
