714 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
vent; ventrals lialf way to vent. Head 3 iu leugtli; depth G. D. 
VII-17; A. 17; V. I, 4. L. 12 inches. Kodiak to San Diego; every- 
where very common; the most abundant of the Cottoids of our west 
coast. 
(Girard, Proc. Acad. Nat. Sci. Pliila. 18.')4, 131; Girard, U. S. Pac. R. R. Surv. Fish. 
60: Ceniridermichthys armaius Giiuther, ii, 171.) 
3Y4.— BIEW1II.EPIDOTUS C uvier. 
(Tcmnistia Richardson: Caliicilepidotus Ayres.) 
(Cuvier, R^gne Anim. ed. 2d, 1829: type Cotius hemilepidoius Tilesius.) 
Body with two broad bands of rough scale-like plates on each side, 
one along the side of the back, one along the lateral line, the upper 
bands meeting anteriorly in front of dorsal; scales roundish, their up- 
per and posterior margins free; skin otherwise naked; head naked. 
Yilliform teeth on jaws, vomer, and palatines. Branchiostegals C. A 
small slit behind fourth gill; gill membranes joined to the isthmus, 
sometimes forming a narrow fold across it; preopercular si)ines simple, 
strong. Dorsal fins connected, the first long, with strong spines, emar- 
ginate, the first three spines shorter than those which follow; ventrals 
I, 4. North Pacific, half; ?. s 7 : c 8 oto <;, scaled.) 
a. Belly immaculate. 
IOD'5'. II. spinosais (Ayres) Grd. — Cahezon. 
Brown, mottled and obscurely barred, often tinged with red; top of 
head usually with brick-red; fins all, except ventrals, mottled with 
blackish and reddish; skin joining bones of jaws unspotted; belly 
whitish, immaculate. Body rather elongate, depressed; head broad, 
somewhat concave between the occipital ridges; two sharp radiating 
ridges behind upper posterior margin of each orbit; top of head cov- 
ered with loose skin, and with thick-set mucous tubes; interorbital 
space narrow, concave, half diameter of eye; preopercle with 2 strong, 
shortish, diverging spines above; fleshy slips above opercle, near upper 
posterior part of eye, and at occiput ; a long fleshy slip on maxillary, 
and 4 on lower jaw; many scales on sides with small flai)s; skin, where 
not scaly, thin and lax; dorsal band of scales with about 7 rows at 
its widest part, anteriorly much wider than the space between it and 
the lateral band ; isthmus rather narrow, the membranes not forming 
a fold across it; dorsal fins considerably connected, spines very low, 
the highest about two-thirds the height of the soft rays, and in 
head; first dorsal spine about half as long as maxillary; pectorals 
