ae ew ae ae ee 
Dec. 28,1916. FisHes of PANAMA— MEEK AND HILDEBRAND. 271 
opposed to the premaxillary teeth; the latter narrow at bases, broad at 
tips, the cusps of about equal length, forming a straight transverse 
cutting edge; no teeth on sides of lower jaw; gill-membranes broadly 
united, free from the isthmus; gill-opening short; gill-rakers very short; 
lateral line complete; scales moderate, 35 to 45 in lateral series, a few 
large scales on caudal lobes; dorsal fin inserted in advance of middle 
of body, partly in front of ventrals; anal very short; pectorals and ven- 
trals similar, short and broad; adipose fin minute, over posterior rays of 
anal. 
23. Apareiodon dariensis (Meek & Hildebrand). 
Parodon dariensis Meek & Hildebrand, Field Mus. Nat. Hist. Pub., 
Zo6l. Ser., X, 1913, 83 (Rio Cupe, Cituro, Darien, Panama). 
Apareiodon dariensis Eigenmann, Ann. Carnegie Mus., X, 1915 (1916), 
71. 
Head 4.6 to 4.7; depth 4 to 4.2; D. 11; A. 9; scales 35 to 37. 
Body elongate, not much compressed; dorsal profile anteriorly 
evenly convex; lower outline anteriorly straight, parallel with longitu- 
dinal axis of body; head not deeper than wide; snout pointed, much in 
advance of mouth, 2.8 to 3 in head; eye 4.2 to 4.4; mouth very small, 
inferior; the lower lip with a straight transverse margin in the largest 
specimen, the type, in the next largest it is somewhat rounded, in the 
smallest it is distinctly triangular and feebly 5 lobed; lower jaw entirely 
without teeth in the 3 specimens at hand; teeth in upper jaw in the 
largest specimen very narrow at base expanded at tip, with a transverse, 
pectinate margin; teeth of middle size specimen narrow at base, then 
expanded and again narrower at tip, one of the cusps much enlarged, 
pointed; those of the smallest specimen narrow at base, much expanded 
at tip with an oblique, smooth margin; lateral line complete, straight, 
very feebly developed, especially in our smallest specimen; scales 
moderate, striate, regularly placed, 10 or 11 in median series in advance 
of dorsal; 2}4 rows between lateral line and base of anal; 5 or 6 across 
caudal peduncle from one lateral line to the other; dorsal fin inserted 
in advance of ventrals, its origin midway between tip of snout and tip 
of adipose or a little nearer the latter; adipose fin small, over posterior 
rays of anal; caudal fin forked, with a few large scales on base of fin; 
anal fin very small, shorter than dorsal, its origin nearer base of caudal 
than base of ventrals; ventral fins very broad, with 9 rays, reaching past 
vent which is situated midway between base of ventrals and origin of 
anal; pectoral fins broad, with 14 rays, inserted under margin of 
opercle, reaching about 34 of the distance from their base to origin of 
ventrals, \ 
