107(a). COTTID^ — ICELUS. 
689 
365.— ICELUS Kroyer. 
(Kroyer, Natarliist, Tidsskr. i, 253, 1844: type IceJus hamatm Kroyer.) 
Body fusiform, uaked, or variously covered with rough scales or 
plates, which are permauent and alike in both sexes; skin otherwise 
smooth. Mouth rather large; teeth on vomer and palatines. Head 
naked or scaly, usually with cirri; preopercular spine hooked, branched, 
or forked. Gill-membranes broadly united, free from the isthmus ; no 
slit behind fourth gill; ventral raj’S I, 3. Xorth Atlantic and Pacific; 
the species difiering greatly in appearance and armature, re- 
sembling.) 
* Skin more or less scaly. 
a. Spinous dorsal not emarginate. 
h. Top of head and interorhital area couvex and nearly smooth; head naked. 
{Artedius* Girard.) 
1046. I. lateralis (Grd.) J. & G. 
Dark clear olive-green ; head reddish-shaded, the back with sharply 
defined cross-blotches, alternately dark olive and pale; lower half of 
sides usually with numerous small pale spots; beUy bluish; fins barred 
with different shades of olive, reddish brown, and black; northern spe- 
cimens with a black spot on the front of the spinous dorsal; below it 
a scarlet crescent, bordered with yellow. Body rather slender, little 
compressed. Head long and low, less deep than in the other species; 
occipital region almost flat; interocular si)ace much narrower than the 
eye. Eye shorter than snout, nearly 5 in head; skin of head every- 
where perfectly smooth, its upi^er surface with numerous small con- 
spicuous pores, and many slender small cirri ; no distinct siiftraorbital 
cirrus, and no occipital ridges; nasal sjiines small. Mouth very large, 
the jaws nearly equal, the maxillary extending to below the posterior 
edge of the e.ve, its length about half that of the head ; i)reopercular 
spine very small, covered with the skin, forked at tip. Dorsal band of 
scales narrow, of about 8 rows anteriorly, 2 or 3 posteriorly. Lateral 
line anteriorly, with small cirri. Dorsal spines veiy slender, the first 
two shorter than the others; pectorals reaching front of anal. Head 
2f; depth 5. D. IX-IG; A. 13; V. I, 3; scales about 28 in a lougitu- 
* Girard, Proc. Acad. Nat. Sci. Phila. 1856,134: type Scorpcenichlhys lateralis Girard. 
Dedicated to Petrus Artedi, the “father of Ichthyology,” the ablest student of fishes 
before Cuvier. 
Bull. Xat. Mus. Xo. 16 41 
