PROCEEDINGS OF UNITED STATES NATIONAL MUSEUM. 195 
k. Body subfusiform, the depth less than one-third the length; 
breast scaly; teeth of outer series small, not 
canine-like ; a black opercular spot; no spot 
on pectoral; arch of lateral line about half 
straight part. 
l. Pectoral fin very long, considerably longer than head ; head 
o) 
3% in length; depth 34; 2d D. 1, 22; A. 1, 20; 
Scmbesa0ooS fees 2 ose eee CABALLUS, 16. 
WU, Pectoral moderate, about as long as head ; head 3% inlength ; 
depth 34; D. 1, 24; A.1, 19; scutes 50. 
Curysus, 17. 
kk. Body oblong-ovate, the depth more than 4 the length; outer 
teeth rather strong. 
m. Vertical fins pale; general color silvery. 
n. Breast scaly ; lower teeth scarcely canine-like ; opercu- 
lar spot very small or obsolete; no pectoral 
spot; pectoral 3 in length; head 32; depth 
22; 2d D.1, 20; A.1,17; scutes 30..Larus, 18. 
mn. Breast naked, except a small rhombic area before ven- 
trals; two small canines in front of lower 
, Jaw; opercular spot large; adult with a black 
spot on pectoral; pectoral 3 in length; head 
34; depth about 3; 2d D. 1, 20; A. 1, 16; 
scutes (developed) about 25..---- Hippos, 19. 
mm. Vertical fins chiefly black; general color brassy or 
blackish; lower teeth not canine-like ; breast 
scaly. ‘ 
o. Anterior profile gibbous; head very large; curve of 
lateral line less than } straight part; second 
dorsal and anal strongly falcate ; anterior lobe 
of dorsal about } head; pectoral very long, 22 
in length; color nearly uniform black; head 
34; depth 22; 2d D. 1,21; A. 1, 18; scutes 
DOM O Oe ae ans eee cleans .--- LUGUBRIS, 20. 
oo. Anterior profile scarcely gibbous; curve of lateral 
line a little more than # straight part; soft 
dorsal and anal strongly faleate ; anterior rays 
of dorsal ? head; pectoral a little more than 
$ body; color dark olivaceous or brassy; 
sides with many small dark brown spots; 
head 34; depth 22; 2d D.1, 22; A.1,19; scutes 
HPOUTISO.e 22 B85 le eee MELAMPYGUS, 21. 
ce, Teeth of jaws equally small; if present, forming viliform bands; maxillary 
broad ; body compressed. 
p. Teeth very minute, disappearing early, none on vomer 
or palatines (Gnathanadon Bleeker); breast 
scaly; body broadly ovate, strongly compressed; 
vertical fins somewhat faleate; the lobe of 
dorsal about half head; color silvery, with 
dusky cross-bands; opercular spot obsolete ; 
head 3; depth2; 2d D. 1, 20; A. 1, 16; scutes 
weak, about 15)... te c..<-2- SPECIOSUS, 22, 
pp. Teeth persistent; minute teeth on vomer and pala- 
tines; breast naked. 
