114. BLENNID^. 
755 
m. Dorsal fin of spines only, 
n. Lateral line none. 
0 . Gill-membranes free from the isthmus; no pyloric cceca. 
p. Anal spine none; veutrals I, 3; top of head with 
tentacles Ciiiuolopiius, 410. 
pp. Anal fin with 2 small spines; ventral fins rudi- 
mentary MuU/EXOIDES, 411. 
ppp. Anal fin wdth a large spine in a sheath; ventrals 
wanting Apodiciitiiys, 412. 
00 . Gill-membranes joined to the isthmus; no ventral 
fins; no anal spines; pyloric cceca. 
Axoplarciius, 413. 
nn. Lateral lines several ; pyloric cceca present ; gill- 
membranes free from isthmus; ventrals 
none; anal spines small. 
XlPHISTER, 414. 
mm. Dorsal fin with its posterior half composed of soft rays ; 
gill-membranes broadly united, free from 
isthmus; ventrals wanting; lateral line 
single, high; pyloric cceca present 
Cebedichthys, 415. 
ll. Gill-openings prolonged forward below, separated by a nar- 
row isthmus ; iiectorals nearly as long as 
head; ventrals well develo^jed. Ovipa- 
rous, herbivorous. Arctic. (StichicincB.) 
q. Lateral line jireseut. 
r. Lateral line forked or duplicated. 
Eumesogrammus, 416. 
rr. Lateral line simple, median. ..Stich.eus, 417. 
rrr. Lateral line simple, dorsal. 
• Notogrammus, 418. 
qq. Lateral line obsolete. 
s. Teeth on vomer or palatines -L umpenus, 419. 
S8. Teeth on jaws only Leptoblexxius, 420. 
Jck. Mouth nearly vertical ; gill-membranes attached to the isth- 
mus; scales small; lateral line obsolete; 
noventmis; dorsal of spines only. (Cryp- 
tacanthodhics ) ; Delolepis, 421. 
ff. Body naked; dorsal fins of spines only; ventrals obsolete. 
t. Gill- membranes joined to the isthmus; lat- 
eral line obsolete ; pyloric cceca present ; 
mouth nearly vertical; teeth strong, on 
jaws, vomer, and palatines. 
Cryptacanthodes, 422. 
aa. Molar teeth strong, on vomer, palatines, and sides of lower jaw; dorsal of flex- 
ible spines only ; scales minute ; gill-mem- 
branes joined to the isthmus; no ventral 
fins; air-bladder present; no lateral line. 
(Anarrhichadince . ) 
M. Caudal fin distinct ; body moderately 
elongate Anarrhichas, 423. 
uu. Caudal fin confluent with dorsal and 
anal; body eel-shaped. ' 
Axarrhichtiiys, 424. 
