754 CONTRIBUTIONS TO NORTH AMERICAN ICHTHYOLOGY IV. 
tliem (Clininw) are ovoviviparous. Professor Gill divides tliis group 
into several families {Anarrhichadidce, Blenniidce, Gebedichtliyidce^ XipM- 
diontidw, SticJiwidce, and Cryptacantliidce, but the second, third, fourth, 
and fifth of these groups at least are very closely allied. Genera about 
40; species about 250. 
{Blenniidce pt. Gunther, iii, 206-294.) 
* Molar teeth none. 
a. Teeth loug and slender, curved, hook-like or comh-like; in front of jaws only; 
body naked; dorsal with many soft rays; 
ventral fins well developed. Species 
carnivorous, oviparous, chiefly tropical. 
(Blenniince.) • 
i. Anterior teeth canine-like, unequal; some of the teeth movable; others angu- 
larly bent; gill-membranes free from isth- 
mus Ophioblennius, 401. 
bb. Anterior teeth comb-like, equal ; teeth all fixed, 
c. Gill-membranes broadly united to the isthmus, the gill-openings restricted to 
the sides. 
d. Mouth large, the head rather pointed ; no canines Chasmodes, 402. 
dd. Mouth small; the head decurved in iirofile. 
e. Caniue teeth none Isesthes, 103. 
ee. Canine teeth present in one or both jaws posteriorly. 
Hypleurochilus, 404. 
cc. Gill-membranes free from the isthmus, or at least forming a fold across it; 
posterior canines present. . Blennius, 405. 
aa. Teeth conic, not comb-like. 
/. Body scaly. 
g. Lateral line present (or more or less obsolete), single, high in front, 
abruptly curved above pectorals, becom- 
ing median posteriorly ; dorsal fin wdth 
one or more soft rays; gill-membranes 
free from isthmus ; ventrals well devel- 
oped. Species carnivorous, ovovivii^a- 
rous, chiefly tropical. {Clinince.) 
h. Soft dorsal of numerous rays ; scales small, 
i. Maxillary greatly developed, reaching far beyond eye ; teeth on 
vomer and palatines Neoclinus, 406. 
ii. Maxillary moderate. 
j. Air-bladder obsolete ; caudal fin rounded Clinus, 407. 
ii. Air-bladder large; caudal forked; teeth ou palatines. 
Heterostichus, 408. 
Jih. Soft dorsal of a single ray; scales rather large; a notch behind 
third spine of dorsal. 
Cremxobates, 409. 
gg. Lateral line, if present, straight, concurrent with the back ; some- 
times branched or duplicated. 
k. Mouth horizontal or nearly so. 
1. Gill-openings not continued forward below, the membranes 
broadly united, free from isthmus or not; 
ventral fins very small or wanting. Spe- 
cies carnivorous or herbivorous; ovipa- 
rous (?) Arctic or subarctic. {XipMate- 
rinoB.) 
