274 
@. occipital process triangular with straight 
sideborders ..... Sos Mee aA ED. 
&. Teeth in two groups !). (Psewdarius Blkr.). 
Ts 
teeth in the upper jaw in a band, at least 
6mtimes as lone wasebroadiinvs jn) ston ener ts 
teeth in the upper jaw in a band, 3 times 
asilongwas broadsememe omeitcne 5.0 Gy) B10, 600° 
II. Teeth on the palate villiform, or conical and pointed. 
A, Teeth in three groups on each side, forming a 
large triangular patch with the base anteriorly 
OMT EV) CLs See, eum eee nso 506 
ZB, Teeth in two groups on each side in a transverse 
row. (Hexanematichthys + Hemiarius Blkr.). 
ie 
outer groups triangular with emarginate 
hindborder, greatly exceeding in size the 
very small contiguous inner groups..... 
outer groups rounded or oval, larger than 
the inner groups which are generally distant. 
a. occipital process hemispherically rounded 
6. occipital process more or less triangular. 
a. base of adipose fin longer than that 
of dorsal, twice or less in its distance 
from that fin. 
a. Dorsal spine as long as head from 
MOMS  oooo hoo oe fc Slat 
@’. Dorsal spine as long as postorbital 
part of head 2). 
a', Head 4—4?/3 in length. Pectoral 
spine as long as head without 
snout, longer than dorsal spine 
61, Head 3 in length. Pectoral 
spine shorter than half head 
and shorter than dorsal spine. 
a. eye 9!/,-11'/) in head, base 
of occipital process 2/, of 
its lengthioe. cede erate 
b?, eye 61/4, base of occipital 
process 1/, of its length. 
A. goniaspis p. 283. 
A. maculatus p. 284. 
4. microcephalus p. 285. 
. A. thalassinus p. 286. 
SAL gagorides p- 288. 
A. sagor p. 289. 
. A, stormi p. 291. 
A. carinatus p. 292. 
A, nudidens p. 294. 
. A. spatula p. 296. 
1) In using this table one ought to remember that in some cases the ante:ior patches of teeth 
on the palate may be rudimentary or the teeth nearly wanting, with the result that there seem to 
be only two patches in all. 
2) In young specimens of A. nudidens the dorsal spine is 1 eye-diameter longer. 
