14 
ANALYSIS OF GENERA. 
1 
a* Ventral origin median in body without caudal, or nearly so. 
” 2 
b. ALEPOCEPHALINAE. Snout short or moderate. 
1 
c. Body covered with scales. 
1 
d. Ventrals present. 
1 
e« Maxillaries toothless; branchiostegals usually 6. 
1 
f. Lead moderate, 3 or more in body without caudal. 
1 
■g, Premaxillaries not greatly expanded or ensheathing mandible; dorsal 
and anal opposed. 
a T ' - * --v' . v t 
' . .1 . 1 ' 
ALEP0C1PHALUS. 
h. Jaws even, or nearly so. 
2 
h. Snout well protruded in slender point before mandible. 
wmm 
HALISAURICEPS. 
2 
g. Premaxillaries greatly expanded, ensheathed mandible. 
1 
i. Maxillary not extending behind eye; dorsal origin behind anal 
origin. 
XENOGNATHUS. 
i. Maxillary extends well beyond eye; dorsal advanced from anal. 
LEPTOCHILICHTEYS. 
f. Head very large, long as rest of body without caudal. 
ASQOAMICEPS. 
e. Maxillaries with teeth; branchiostegals 7. 
1 
j. Body elongate. 
1 
k. Upper teeth uniserial. 
BATHYIROCTES. 
K. Several series of teeth on premaxillaries, maxillary teeth 
uniserial 
NARCETES. 
T 
