275 
@. base of adipose fin shorter than that 
of dorsal, more than 2 times in its 
distance from that fin. 
#. teeth on palate in a continuous 
row of square patches without 
nNGhEMN TARAS Ao Sig Gono pe A. latirostris p. 296. 
@’. teeth on palate in a row of 4 
patches, the median ones being 
separated by an interspace at least 
half their length. 
a', Dorsal spine much longer than 
that of P. and as long as head 
ioe INGIATHIE, 6 5 5 Gg Guo oc A. stirlingit p. 297. 
61, Dorsal spine equal to or shorter 
than that of P. and at most as 
long as head without snout. 
a?, adipose fin about 5 times in 
its distance from dorsal, op- 
posite to hinderhalf of anal A. danielsi p. 300. 
62, adipose fin 21/,-4 times in its 
distance from dorsal, above 
anterior half or middle of : 
anal, 
a3, occipital process with the 
sideborders slightly conver- 
ging, nearly parallel. 9 gill- 
HAIRS cals io o.8 6 .... A. acrocephalus p. 302. 
63, occipital process triangular, 
with the sideborders con- 
spicuously converging. 12 
GTA EES oeimehie et towel <iitts A, leptaspis p. 303. 
C. Teeth in one group on each side. 
I. median fontanel on upper surface of head 
posteriorly broad, heart-shaped, with a 
smaller ovate one on each side. Hind- 
border of dorsal spine with the dentation 
partly directed upward. (Cephadocassis Blkr.) A. melanochir p. 305. 
2. median fontanel not broadened posteriorly. 
(Arius Blkr.). 
a. teeth on palate in a pearshaped patch 
with the points directed backwards, the 
long axes converging backwards..... A. leptonotacanthus p. 306. 
6, teeth on palate in ovate patches, the 
