486 REVIEW OF NORTH AMERICAN GOBIID^. 



10. EVORTHODUS. 



EVORTHODUS Gill, Proc. Acad. Nat. Sci. Phila., 1859, 195 (breviceps). 



Type Evorthodus breviceps Gill. 



We know nothing of this genus beyond the account given by Dr. 

 Gill. Its dentition more resembles that of the Sicydium group than the 

 true Gobies, though it (inferentially) agrees with the latter in the de- 

 velopment of its ventral fins. 



ANALYSIS OF THE SPECIES OF EVORTHODUS. 



a. [Teeth eniarginate, uniserial ; those of the lower jaw nearly horizontal ; some of 

 the dorsal rays filamentous; proiile blunt, evenly decurved ; head about as 

 deep as wide, 4| in length ; depth 4| ; eye 3 in head. Caudal rounded, 3 in 

 body ; dorsal VI-I, 10; anal I-ll. Color light-brown, with irregular blackish 

 blotches along the sides; two black spots at base of caudal fin, one above the 

 other alternating with one anterior on the peduncle ; first dorsal with two 

 bands parallel with its upper margin, second dorsal with three narrow longi- 

 tudinal bands.] {Gill) BrevicEPS, 17. 



17. Evorthodus breviceps. 



Evorthodus breviceps Gill, Proc. Acad. Nat. Sci. Phila., 1859, 195 (Trinidad) ; 

 Gunther, Cat. Fish. Brit. Mus., Ill, 85, 1861 (Triaidad ; Surinam). 



Habitat. — Fresh waters of Trinidad and Surinam. 



We know this species only from the description of Dr. Gill. 



11. LOPHOGOBIUS. 



LoPHOGOBius Gill, Proc. Acad. Nat. Sci. Phila., 1862, 240; {cri8ta-galli:=cyprinoideB.) 



Type Gobius erista-galli Cuv. & Val. 



The single species which forms this group differs consideiably in form 

 from our other gobies. The study of its skeleton shows no distinction 

 of much iuiportance, unless the peculiar forn» of its interorbital area be 

 regarded as such. 



ANALYSIS OF THE SPECIES OF LOPHOGOBIUS. 



a. Body short and deep, little compressed, cyprinodontiform ; greatest hight 3f in 

 length; greatest width 5J ; length of head 3| ; head naked; a prominent na- 

 ked dermal crest extending from above middle of eyes to near front of spinous 

 dorsal ; diameter of eye 3^ to 4 times in head, little greater than interorbital 

 area; profile convex: snout stout, bluntish, about as long as eye; mouth 

 very obli(iue, the gape slightly curved ; upper lip on level of lower border of 

 eye; lower jaw somewhat projecting ; teeth in both jaws in bauds, the outer 

 series somewhat enlarged and erect ; those of the inner series small, depressible 

 backwards; scales large, reduced on breast and nape; a few scales on the 

 upper edge of the opercle; median line before dorsal naked; dorsal spines 

 produced in short filaments ; last rays of soft dorsal reaching caudal ; caudal 

 rounded; pectorals lanceolate, reaching beyond insertion of anal, its upper rays 

 not silk-like ; dorsal VI orVJI-ll; anal 10; scales 26 to 30; color blackish- 

 greeu, some green streaks about eye C yprinoides, 18. 



