194 PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 
d. Dorsal and anal fins not faleate, their bases with a conspicuous sheath of 
scales; teeth small; breast scaly. 
e. Maxillary very narrow, its greatest width scarcely one-fourth eye; head 
small; lateral line strongly arched in front; 
teeth uniserial, those on vomer and palatines 
minute or obsolete (Hemicaranax Bleeker). 
f. Arch of lateral line very strong, its height more than one-third its length, 
which is much less than half the length of the 
straight part; upper lobe of caudal faleate, 
much longer than lower; mouth small, reach- 
ing little past front of eye; head 4} in length; 
depth 24; 2d D. 1, 28; A. 1, 25; shields 50; 
pectoral little longer than head, its base dusky. 
AMBLYRHYNCHUS, 9. 
Sf. Arch of lateral line strong, its height less than one-third its length, which 
is about half the straight part; caudal lobes 
subequal; mouth small, reaching scarcely past 
front of eye; head 4; depth 2?; 2d D. 1, 29; 
A. 1,25; shields 60; pectoral half longer than 
head, its basal part and axil jet-black. 
ATRIMANUS, 10. 
ee. Maxillary broad; head rather large ( Uraspis Bleeker). 
g. Lateral line strongly arched, its arch much shorter than its straight 
portion, 
h. Teeth on vomer, palatines, and tongue ; arch of lateral line not half 
as long as straight portion; breast scaly; lat- 
eral scutes strong, about 48 in number; head 
34; depth 3; 2d D.1, 24; A. 1, 19; sides with 
dark bars; a black,opercularspot-.-Vinctus,11. 
hh. Teeth on vomer, palatines, and tongue obsolete; arch of lateral 
line a little more than half length of straight 
part; head 33; depth 2; 2d D. 1, 28, A. 1, 24; 
scutes57; sides with dark bars; a black oper- 
CularspObs= 2s seem aes ccieee ees LEUCURUS, 12. 
gg. Lateral line little arched, its curved part not shorter than its straight 
part; maxillaries scarcely reaching front of 
eye. . 
i. Opercular spot distinct ; body deep, compressed, the depth about 
3 in length; small teeth on vomer and pala- 
tines, disappearing with age. 
j. Snout 23 in head; head 32 in length; depth 33; 2d D.1, 26; A. 
1, 21; shields 24 to 29. .-.---..--2 DENTEX, 13. 
jj. Snout 24 in head; head 3} in length; depth 3; 2d D. 1, 27; 
A. 1,22; shields'25 to 29: -. -222 PLATESSA, 14? 
ii. Opercular spot obsolete ; body rather elongate, the depth 3 to 3 
in length; teeth on vomer and palatines per- 
sistent; snout 3 in head; head 3}in body; 2d 
D. 1,26; A. 1, 22; shields 25 to 29. .RUBER, 15. 
dd. Soft dorsal and anal elevated in front and more or less faleate ; upper teeth 
in a band, the outer enlarged; lower teeth in 
one series; teeth on vomer, palatines, and 
tongue; maxillary broad; dorsal sheath of 
scales not greatly developed (Caranz). 
