NATURAL SCIENCES OF PHILADELPHIA. 26 



in width to the snoot, whose periphery is convex. Cheeks in front oi preo- 

 perculum tumid. 



Eyes rather small, longitudinal, oblique, distant from each other and situated 

 nearer the middle of the anterior half of the head. Opercular unarmed ; the 

 preoperculum hidden in a fleshy mass ; the operculum higher than long. 



Mouth scarcely longer than wide, and with the cleft scarcely oblique, the 

 supramaxillars passing under most of the eye. Lower jaw rather shorter 

 than the upper, intermaxillars little protractile downwards, with the posterior 

 processes short and the lateral branches thick, little attenuated backwards, and 

 without crests. Supramaxillars longer than the intermaxillars, slightly twisted 

 and curved, compressed behind and surmounted by a longitudinal keel below 

 which the expansion takes place, and at whose end the bone is convex. 



Tongue moderate, oblong, truncated and free in front. 



Teeth fixed, slender, curved and acute, pauciserial, enlarged in the outer 

 row. Palate smooth. 



Branchial apertures lateral, nearly vertical, bounded above by a membrane 

 attached in front of the upper pectoral rays, slightly curved forwards below ; 

 isthmus very wide. 



Branchiostegal rays five. 



Dorsal fins distinct; the anterior oblong, normally with seven slender spines, 

 the last two remote from each other and the preceding. Second dorsal ob- 

 long, (I. 10 12), with its rays generally having an anterior simple and pos- 

 terior forked branch ; the last ray free. 



Anal fin oblong, (I. 10 12), smaller than the second dorsal and extending 

 less backwards, but of similar structure. 



Caudal fin convex behind. 



Pectoral fins well developed, convex behind, with the rays distinct and 

 almost all branched. 



Ventral fins inserted below the bases of pectoral, rather small and obliquely 

 infundifuliform, the inner rays longest and well connected, the interspimoup 

 membrane low. 



The genus Gobiosorna \b apparently peculiar to North America, and is rep- 

 resented on both the Eastern and Western coasts. The foreign species re- 

 ferred to it belong to several genera, the Gobius macrognalhus Blkr. of Japan, 

 differing in the form of the head, &c, may be named Gymnogobius ; the G. ophi- 

 ocephalus Jenyns, in form and development of fins, Ophiogobiw ; the 

 G. Nilssonii D. & K., distinguished by the biradiate first dorsal, may take the 

 name Orystallogobius, and G. stuvitzii D. & K., Boreogobius. 



Gobjosoma albpidotum (Girard,) 



Gobius alepidotus, Lac. 



Gobius viridipallidus, Mitch. 



Gobius Boscii, Guv. et Val. 



Gobius alepidotus = Gobiosorna sp. Girard. 



Gobiosorna alepidotum, Giinther 



D. VII. 



Hab. New York to South Carolina. 



Subfamily ELEOTR1NAZ (Bon) GUI. 

 Genus DORMITATOR Gill. 



Synonymy. 



Dormitator Gill, Catalogue of the Fishes of the Eaatero coast of North Ame- 

 rica, &c, p. 44 (named only.) 

 Dormitator Gill, Proc. Academy of Natural Sciences of Phila., 1862, p.. 240. 

 Bleotris Sp. auct. 

 Prochilus Cuvier, Regne Animal ed. i. tome ii. p. 2JH 



1863] 



