G30 COXTRIBUTIOXS TO XORTII AMERICAX ICHTHYOLOGY lY. 
iuluibit fresh waters, and others live indiscriminately in either fresh or 
salt water. Genera 00-70; species nearly 400. 
{Gobiidoi part; groups Gobiina, Ambhjopina, aud Triipaiiclienina Giiutber, iii, 1-138.) 
* I'entrals separate ; body scaly. (Elcotridiua;.) 
a. Vonieriue teetb present; istbiiius narrow, tbe gill-opening.s continued forward 
below Philypxus, 33'J. 
act. Vomerine teetb wanting; istbinus broad. 
b. Scales small (dO-lOO in a lengthwise series) ; teetb fixed Eleotris, 340. 
bb. Scales large (30-35 in a lengthwise series); outer teetb mov.able. 
Dormitator, 341. 
Ventral lins united. 
c. Dorsal lins separate. (Gobiina;.) 
d. Dorsal spines several. 
c. Body scaly. 
/. Scales ctenoid; dorsal spines G; maxillary moderately developed, end- 
ing below tbe eye. 
h. Teeth in tbe upper jaw emarginate, in one series; teetbof lower jaw 
horizontal Evorthodus, 342. 
hh. Teetb all simple. 
i. Teeth in the upper jaw in one series; those below in a very narrow 
band Euctexogobius, 343. 
ii. Teeth in several series in each jaw. 
j. Teetb of tbe outer series fixed, somewhat enlarged; body not 
greatly elongate Gobius, 344. 
jj. Teetb of tbe outer series setaceous, movable; body extremely 
long aud slender Gobioxellus, 345. 
ff. Scales very small, cycloid. 
k. Maxillary inordinately developed, in the adult, reaching tbe 
gill-opening; dorsal spines 6 Gilliciitiiys, 346. 
kk. Maxillary moderately developed; dorsal spines 7 or 8. 
Lepidogobius, 347. 
ee. Body naked; teetb in bands; no canines Gobiosoma, 348. 
dd. Dorsal spines 2; body naked; eyes obsolete ..Typhlogobius, 319. 
cc. Dorsal fin continuous ; scales minute or wanting. (AmbJtjopinw.) 
1. Teetb in a single series Tyxtlastes, 350. 
339.— PHIL YPNFS Cuvier & Valenciennes. 
(Lembus Giintber. ) 
(Cuv. & Val. Hist. Xat. Poiss. xi, 255, 1837: type Platycephalus dormitator Bloch & 
Scbn.) , 
Body elougate, terete anteriorly, compressed behind. Head elongate, 
depressed above. Month large; lower jaw longest. Teeth cardiform, on 
jaws and vomer; no teeth on palatines and tongue. Gill-oiieuings con- 
tinued forward below, so that the isthmus is very narrow. Scales mod- 
erate, ctenoid, covering most of the head. Dorsal fins well separated, 
the first of 7 spines; ventrals separate. Largest of the Gobies, some of 
the species reaching a length of nearly 2 feet Troiiical rivers and 
bays. (i/u'An-vos, slumber-loving.) 
