FISHES OF CHESAPEAKE BAY 
39 
XX. Bodj r elongate, only moderately 
compressed; the back not greatly 
elevated; preopercle entire or 
with fine serrations; caudal fin 
forked .Pomadasidse (grunts), p.257 
ww. Vomer and palatines with teeth. 
y. Head and body much compressed; 
mouth very oblique to nearly 
vertical; eye very large; post- 
orbital part of head short; 
scales small, very rough 
Priacanthidx (catalufas),p. 253 
yy. Head and body only moderately 
compressed; mouth moderately 
oblique to nearly horizontal; 
eye small to moderate; post- 
orbital part of head not short- 
ened; scales not excessively 
rough. 
2 . Maxillary for the most part 
slipping under preorbital; 
opercle without a spine; teeth 
in the jaws rather strong, 
unequal, some of them usually 
enlarged 
_ _Lutianidx (snappers), p. 256 
zz. Maxillary not, or only partly, 
concealed by the preorbital; 
opercle ending in a spine. 
(a) Body elongate, compressed; maxillary without a supplemental bone; teeth pointed, 
fixed; two dorsal fins; scales of moderate size Moronidse (white basses), p. 244 
(aa) Body oblong, somewhat compressed; maxillary with a supplemental bone; dorsal fin 
continuous; scales quite small Epinephelidx (groupers), p. 250 
nn. Gills 3)4, the slit behind the last small or wanting. 
( aaa ) Body rather robust; maxillary without a supplemental bone; teeth pointed, fixed; 
dorsal fin continuous; scales moderate or large Serranidse (sea basses), p. 251 
(6) Head and body more or less compressed; eyes lateral, moderately large; scales large; 
mouth horizontal to more or less oblique. 
(c) Teeth in the jaws large, separate Labridse (lipped fishes), p. 317 
(cc) Teeth in the jaws coalesced, forming a continuous cutting edge 
Scaridx (parrot fishes), p. 321 
(66) Head broader than deep, partly covered with bony plates; eyes very small, on top of 
head; mouth vertical, surrounded by fleshy fringes 
, Uranoscopidx (star-gazers), p. 329 
dd. Suborbital with a bony stay; head inclosed in bony plates, bearing spines; pectoral 
fins long, winglike, with the three lowermost rays detached and free from each 
other, developed as feelers Triglidx (sea robins), p. 312 
cc. Ventral fins close together forming a sucking disk, or separate, with a sucking disk 
between them of which they form a part. 
(d) Body short and thick, more or less triangular in cross section; skin with bony 
tubercles; suborbital stay present; opercles normally developed; gills 3)4; 
ventral fins forming the bony center of a sucking disk 
Cyclopteridse (lumpfishes), p. 311 
(dd) Body oblong or elongate, roundish or more or less compressed; body with or 
without scales; no suborbital stay; opercle normally developed; gills 4; ven- 
tral fins close together, forming a sucking disk Gobiidx ("gobies), p. 322 
49826—28 -4 
