184 DEEP SEA FISHES. 
large, two thirds as long as the snout, nearly one fifth of the length of the 
head, rising to the level of the crown. Mouth wide, cleft descending back- 
ward to below the middle of the eye, lower jaw longer. Teeth medium, 
slender, acute, compressed near the point, depressible, in a couple of widely 
set series on jaws and vomer, outer series smaller. No palatine teeth. 
Chin prominent, blunt, ascending gradually forward, without a barbel. Gill 
opening wide, extending forward farther than the middle of eye; mem- 
branes slightly united, free from the isthmus. Four gills, a short cleft 
behind the fourth; first arch bearing eighteen slender rakers on its outer 
edge, the longest two thirds as long as the eye. Nostrils small, widely 
separated across the head, nearer to the eye than to the end of the snout, 
posterior subcrescentic, anterior smaller, circular, close to the posterior. 
First dorsal originating above the bases of the pectorals, the length of its 
base hardly equal to that of the snout, third and fourth rays longest, form- 
ing an acute angle with the shorter rays behind them. Second dorsal sepa- 
rated from the first by less than half of the ocular diameter, nearly divided 
into two parts by a notch at the sixteenth ray, which is the shortest, longest 
rays among the hinder, not reaching the caudal, rounded on the angles. 
Anal fin like the second dorsal, with a notch at the sixteenth ray, and with 
its longest rays near the caudal base. Caudal more than half as long as the 
head, hind margin slightly indented. Pectorals narrow, long, two thirds as 
long as the head or longer, reaching to the fifth ray of the anal or backward. 
Ventrals small, little more than two thirds as long as the pectorals, bases 
forward of those of the latter, extremities not reaching to the vent. 
Scales small, those of the lateral line somewhat larger, very thin, marked 
with fine concentric strix, very small on the top of the head and on the 
opercles, in about thirteen series above the lateral line and thirty-nine be- 
low it. Anteriorly the lateral line is above the middle of the flank, to which 
it descends near the middle of the total length, whence it continues distinctly 
visible to the caudal. On the head the sensory apparatus of the lateral sys- 
tem takes on a peculiar appearance, Plate LXXXII. fig. 1. The distribu- 
tion of the disks corresponds with that of the Brotuloids or with other 
Gadidx, Plate LX XXII. fig. 2. The disks differ somewhat in their irregu- 
lar sizes and in their shapes, being like short transverse bands apparently 
without the circular or oval centra. The upper or glandular layer appears 
to be evenly spread over the entire upper surface of the band and does not 
show limits as in all the other species dissected. These differences no doubt 
