587 
Depth 6 7/8; head 3 l/3, width 2. Snout to eye 2 1/4 in head; 
eye 6 l/5, 2 2/3 in snout, 1 4/5 in interorbital; orbit 4 in head, 1 l/2 
in snout, 1 l/lO in interorbital; maxillary reaches 4/5 in eye, length 
from, front end 2 7/8 in head; mandibular barbel 2 l/3 in eye; teeth even, 
in villiform bands in jaws, of 7 or 8 irregular series; interorbital 3 2/3 
in head, low, level or nearly flat,. Gill rakers 4 + IS on first arch, 
lanceolate, rather robust, short, 2 1/4 in gill filaments, -which 2 l/4 in eye. 
Scales 135 in lateral line to pseudocaudal; 4 above, 18 below, 
t 
35 predorsal of which 16? forward till opposite hind upper vertical edge 
of preopercle. Each scale with strong median spine, with 2 3 smaller 
auxilliaries; circuli fine, basal* Ridge of scales beginning each side of 
occiput extends back along each side of dorsal fin bases, these with 
larger spines* 
D. II, 96?, second simple ray entire, second branched ray 4 4/ 7 5 
in headj interdorsal space l/6 of eye; A. 95?, fin height 8 in head; 
pseudocaudal small; pectoral rays 16, fin 3 l/lO in head; ventral rays 
I, 5, fin 4 l/2* 
Dark brown, head paler* Inside mouth brown and gill opening 
inside blackish brown* Iris pale* Fins more or less brown, with dusky 
to dark brown* 
Eastern Pacific. 
U* S. N. M., no. 48205* Lat. 00° 29* S*, long. 89° 54* 30” W., Galapagos 
Islands. In 392 fathoms. April 15, 1888. Albatross Collection (D.2818). 
Length 448 mm. Type of Trachyrhynchus helolepis Gilbert. 
