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ACANTHOPTERYGIOUS FISHES. 
Sect. I. Body lengthened, compressed, ribband-shaped, with an extended dorsal fin, 
a. Snout short ; maxillaries distinct. 
Cepola. 
aa. Snout produced ; gape wide ; teeth strong. 
Trichiurus. 
Lepidopus. 
II. Rays of the dorsal fins slender and flexible. Intestines large, equal, with,^ 
mt cceca. 
a. With ventrals. 
b. Ventral fins united. 
Gobius. 
bb. Ventral fins disjoined. 
c. Gill-opening large, the membrane continued across 
the breast ; ventrals reduced. One dorsal fin. 
BLENNIUSIDiE. 
d. Head obtuse, the front nearly vertical. Teeth in 
one row, equal, close set, with large remote 
ones in the back part of the jaw. 
Blennius. 
Pholis. 
dd. Head not sloping suddenly. 
Gunnellus. 
cc. Gill-opening small. Ventrals larger than the pecto- 
rals. Two dorsal fins. 
Callionymus. 
aa. Destitute of ventral fins. 
Anarhichas. 
III. Lips large and fleshy ,* one dorsal fin, with strong spinous rays, anterior- 
ly terminating in filaments. Body oblong, scales large, 
a. Cheeks and gfil-covers scaly. 
Crenilabrus. 
Labrus. 
aa. Cheeks and gill -covers smooth. 
Julis. 
IV. Dorsal and anal fins extensively covered with scales, rendering their jimc- 
tion with the body obscure. 
Brama. 
V. Spinous portion of the dorsal fin capable of depression between the scales 
on each side at the base Scales distinct, 
a. Dorsal fin single. 
b. Gill lid without armature. 
Sparus. 
Pagrus. 
Dentex. 
bb. Gill lid armed with spines. 
Serranus. 
Cernua. 
