244 PROCEEDINGS OF THE NATIONAL MUSEUM VOL, 95 
bladder normal; palatine teeth with an outer 
enlarged row, then an elongate strip along 
inside of enlarged row, a short patch of teeth 
occurring anteriorly, these separately movable 
from elongate strip; about 20 to 24 scalesina 
zigzag row around caudal peduncle. 
Hoplias Gill (p. 308) 
34b. Maxillary without a canine; walls of air bladder 
cellular; no enlarged row of teeth on palatines; 
14 to 16 scales in a zigzag row around caudal 
peduncle. 
35a. Two broad patches of teeth in roof of mouth 
separated by a narrow edentulous strip; 
pterygoids with teeth; dorsal and pelvics 
rounded when spread; opercle with black 
SOOM ON Hoplerythrinus Gill (p. 309) 
35b. Palatines with villiform teeth in a narrow 
elongate band; pterygoids toothless; dorsal 
fin angular or pointed, the longest ray next 
to last; anal and pelvics pointed; rear of 
opercle without black spot. 
Erythrinus Scopoli (p. 309) 
32b. No canine teeth in either jaw; nostrils close together 
separated by a dermal flap; teeth usually 3- to 
7-pointed. 
36a. Premaxillary with a single row of teeth, sometimes 
one tooth on each side a little out of line with 
others. 
37a. Dorsal rays about 18; mouth small, with 
scarcely any gape; maxillary reaching only 
to anterior border of eye; adipose fin present; 
body compressed; snout pointed; lateral line 
incomplete, with 5 or 6 pores; teeth tricuspid 
in both jaws; scales about 25, with 6 in a 
transverse series. 
Elachocharax Myers (p. 309) 
37b. Dorsal rays usually ii, 8 or ii, 9, never more than 
ii, 10. 
38a. Anal origin in front of that of dorsal fin; anal 
fin with a long base, rather straight; caudal 
fin forked; mouth small, oblique, lower jaw 
projecting a little in front of upper; body 
compressed, thin; distance from tip of snout 
to rear of maxillary about 14% in postorbital 
length of head, about equal to interorbital 
width, and 2 to 214 times in distance from 
tip of snout to occiput; tip of snout to occi- 
put 3 to 5 times in length of anal fin base. 
39a. Adipose fin absent; lateral line incomplete 
with 9 to 16 pores. 
Phenagoniates Higenmann and Wilson (pp. 310, 
311) 
396. Adipose fin present; lateral line complete. 
Xenagoniates Myers (pp. 310, 312) 
