FAMILY GOBIDA:] — CHASMODES. 151 
noticed abnormal deviations in the lateral line so frequently, that I am inclined to suspect it in 
the foregoing description. 
This species was found among sea-weed at Nahant in Massachusetts bay, and will very 
probably be discovered on our coast. 
(EXTRA-LIMITAT.) 
P. carolinus. (Cuv. et Vax. Vol. 11, p. 277.) Greenish, with four or five irregular spots along the 
back. Teeth 1, with stout canines. D, 12.18; A. 18. Length four inches. Coast of South- 
Carolina. 
GENUS CHASMODES. Cuvier. 
The branchial aperture open only above the pectoral fin. Mouth deeply cleft, with teeth only 
on the anterior part of the jaws; these are firm, regular, and in a single row. 
Oss. This small group comprises at present but three species, all from the coast of the 
United States. 
THE SI[X-BANDED CHASMODES. 
CHASMODES BOSQUIANUS. 
PLATE XXIV. FIG. 73.— (CABINET OF THE LYCEUM.) 
Blennius pholis. Mircuitt, Lit. and Phil. Soc. N. ¥Y. Vol. 1, p. 374. 
Blennius hentz ? Lesueur, Journ. Acad. Sc. Vol. 4, p. 363. 
Le Chasmodes bosquien, C. bosquianus. Cov. et Va. Hist. des Poiss. Vol. 11, p. 295, pl. 327. 
Characteristics. Dorsal united with the caudal. A minute filament over the eye. Six vertical 
bands. Length three inches. 
Description. Head thick ; its length to the total length as one to three and a half. Mouth 
excessively cleft, and extending to the posterior margin of the orbits. ‘Teeth excessively fine, 
and crowded together like the teeth on a fine comb, on the anterior part of the jaws ; those 
above are blunt-pointed, and about fifty in number; those below are acute, recurved, and 
about the same number: no canines. The branchial rays are six, and the aperture is reduced 
to a small opening above the base of the pectorals. Lateral line indistinct, and obsolete 
behind. 
The dorsal fin is equal throughout its whole length, and equals in height one-third of the 
depth of the body ; it unites with the caudal upon one-quarter of the length of the latter fin. 
The dorsal fin contains twenty-nine equally flexible rays; about the seventeenth, traces of 
articulation are perceptible. The anal distinct from the caudal fin, with nineteen rays ; it 
commences about the middle of the body. Ventrals two-rayed, with a filamentous termina- 
tion, and are about one-sixth of the total length. Caudal fin rounded. 
