492 REPORT OF COMMISSIONER OF FISH AND FISHERIES. 
The spinous plates above the lateral line are similar to those found in A. humilis, 
the anterior ones at least being circular, with a depressed center, and having the 
margin provided with a series of short, strong spines, sometimes interrupted for a 
short distance anteriorly. Under soft dorsal and on caudal peduncle the plates are 
smaller and less regular, being often much reduced in size, bearing 2 or 3 prickles 
directed backward from the margin. Below the lateral line are plates similar to 
those above, but fewer. 
Cephalic tubercles are undeveloped in the young, but become very conspicuous in 
half-grown and adults. One above posterior margin of orbit and one at hinder edge 
of occiput are the largest and bear the short filaments. These rise very abruptly 
without evident connection with ridges. Behind the supraorbital tubercle is a 
smaller one, sometimes accompanied by one or two still smaller elevations, recalling 
in their arrangement the digitate postocular ridges of A. humilis and A. polyacantho- 
cephalus. A smaller tubercle is present also immediately in advance of the principal 
occipital one. Preopercular spine short, the upper one not exceeding, sometimes 
much less than, longitudinal diameter of orbit. A well-developed pore behind last 
gill. Dorsals very high, without appreciable interspace, the longest spine sometimes 
equaling length of snout and eye, 24 in head, equaling the longest rays of soft dorsal. 
Fin rays are as follows in 16 specimens: 
| First dorsal. | Second dorsal. | Anal. | 
Specimens -.--. 15 1 2 
The largest specimen is nearly uniform in the coloration of the upper parts, 
showing but faint traces of the dark bars usually found in this group. In all 
other specimens these are distinctly marked, though more irregular and less sharply 
defined than in A. sellaris and A. polyacanthocephalus. As usual, there is a broad 
bar under spinous dorsal, two narrower ones under soft dorsal, and a fourth on end 
of caudal peduncle. The ground color is unusually pale. In a highly colored male 
the lower part of sides is blackish, provided with roundish large white spots, the 
margins of which are often made conspicuous by a series of minute black specks. 
The fins are conspicuously barred. In most specimens a broad band of the light 
ground color crosses occipital region and extends backward and downward, including 
margin of preopercle above the spines and the greater portion of the opercle. 
Taken at Unalaska, and in Bristol Bay at stations 3228, 3231, 3232, 3238, 3234, 3245, 
3293, and 3300; depths, 5 to 30 fathoms. 
64. Acanthocottus laticeps sp. nov. (Plates 26 and 27.) 
Cottus teniopterus Bean, in Turner’s Contributions to the Natural History of 
Alaska, p. 94, plate 6; not of Kner. 
Differing from A. t@niopterus Kner in the following respects: 
(1) The interorbital width is greater, 1} times the diameter of the eye in laticeps, 
equaling the eye in teniopterus. 
(2) Similarly the distance between the anterior ends of occipital ridges is 1% times 
diameter of eye in luticeps, equal to eye in twniopterus. 
(3) Conspicuous supraorbital and occipital tubercles in laticeps, each surmounted 
by a fleshy filament; in taniopterus ‘‘crown and occiput are without prominences or 
spines, covered only with naked warty skin.” 
(4) In laticeps the preopercle has two diverging spines, a single downwardly 
directed spine below them. In teniopterus are two downwardly directed spines 
below the angle. 
(5) The ventrals are much shorter, not reaching vent when depressed, while in 
tentopterus they reach the anal papille. The dorsals are also much lower in laticeps. 
