708 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
on upper axil, and another toward middle of base of pectoral. Head 
large, depressed, subrliomboidal; preopercle ^Yith a single hooked spine; 
opercle without longitudinal rib or spine; lower jaw and other parts of 
head with numerous large pores. Mouth moderate. Ventrals small. 
Skin naked; a slender filament over each eye, and one on each side of 
nape. Gill-membranes forming a fold across the isthmus. D. YIII- 
13; V. I, 3; B. 5. Bering’s Sti aits. (GiU.) 
{Porocotius quadrifilis Gill, Proc. S. Nat. Mus. 1859, 166.) 
368.— GYMRfACAlVTHUS Swainson. 
{Phohetor Kioyer.) 
{Gipnnocanthus Swainson, Class. Fish. &c., 1839, 271: type Coitus veniraJis C. & V.) 
General characters and appearance of Coitus, but with no teeth on 
the vomer, and with a small but well-defined slit behind the last gill. 
The upper preopercular spine is armed with 2 or 3 antler-like processes, 
and the fins are all very large, the ventrals notably so. Marine species 
of the Arctic Seas, (jupyo^, naked; avA'^Oa, spine.) 
1088. G. psstilliger (Pallas) Gill. 
Dark brown above, with traces of darker vertical bars; belly pale; 
males with the axillary region dusky, with many large round white spots; 
first dorsal blackish, with pale blotches; second dorsal with alternating 
oblique bands of white and blackish; anal and caudal nearly plain; iiec- 
torals and ventrals j^ellowish, with black cross-bars; mandible barred 
with black, is asal spines small ; occipital ridges low, the space between 
them concave, with rough plates; supraorbital ridge ending in a blunt 
tubercle; interorbital area with smooth skin. Eyes very large; maxil- 
lary extending to pupil; upper preopercular spine broad, much shorter 
than eye, with about three points; skin mostly smooth; axil prickly; 
inner edge of middle pectoral rays papillose ( $ ). Spinous dorsal very 
high and long, the longest spines in the male three-fourths length of 
head; second dorsal a little lower; anal very long, rather low; pec- 
torals very broad, reaching past front of anal, the lower rays rajiidly 
shortened; ventrals extremely long, the rays long-exserted, reaching 
past front of anal; anal papilla large. Head 3^; depth 4f. D. XII- 
IG; A. 18; V. I, 3; P. IG; vert. 12 -j- 18. Arctic Seas, south to Xorway, 
Alaska, and Labrador. 
{Coitus instUliger Pallas, iii Cuv. Sc Val. iv, 193, 1829: Coitus ventraVis Cuv. & Val. 
iv, 194: Coitus pistllliger Pallas, Zoogr. Ross.-Asiat. iii, 43, printed 1811, published 
1831 : Acantliocottus patris H. R. Storer, Best. Jonrn. Nat. Hist, vi, 250: Coitus ventralis 
Gunther, ii, 167: Coitus pistilUger Giinther, ii, 167: Coitus iricuspis Reinh. Vidensk. 
