Dec. 28, 1916. FisHes oF PANAMA— MEEK AND HILDEBRAND. 289 
27. Genus Creagrutus Giinther. 
Creagrutus Ganther, Cat. Fish. Brit. Mus., V, 1864, 339 (type Leporinus 
miillert Ganther). 
Body elongate, not strongly compressed; abdomen rounded; head 
rather low; second suborbital large, covering nearly the entire cheek; 
premaxillary teeth in 3 series; maxillary with from 1 to 4 teeth; mandible 
with a single series of teeth, the anterior ones enlarged; gill-membranes 
free from the isthmus; lateral line complete; anal fin short, of not more 
than 17 rays. Species small. 
KEY TO THE SPECIES. 
a. Depth of body 3.6 to 4.3; upper jaw little projecting; none of the 
premaxillary teeth exposed when mouth is closed; 11 or 12 gill- 
rakers on lower limb of first arch. notropoides, p. 289. 
aa. Depth of body 3.1 to 3.7; upper jaw strongly projecting; most 
of the first series of premaxillary teeth exposed when mouth is 
closed; 7 to 9 gill-rakers on lower limb of first arch. simus, p. 290. 
36. Creagrutus notropoides Meek & Hildebrand. 
Astyanax mexicanus (non Filippi) Evermann & Goldsborough, Proc. 
Biol. Soc. Wash., XXIII, r910, 4 (Canal Zone, Panama). 
Creagrutus notropoides Meek & Hildebrand, Field Mus. Nat. Hist. Pub., 
Zoél. Ser., X, 1912, 68 (Rio Indio, upper tributary of Rio Chagres). 
Creagrutus affinis (in part) Eigenmann, Indiana Univ. Studies, No. 18, 
1913, 7 (Rio Chagres; Puerto Negria; Istmina; Boca de Raspadura). 
Head 3.6 to 3.95; depth 3.6to 4.3; D. 10;A. 14 to 16; scales 5-34 to 38-4. 
Body elongate, not strongly compressed anteriorly; caudal peduncle 
rather strongly compressed, its depth 2.1 to 2.5 in head; dorsal region 
little elevated; head low, rather wide; snout blunt 3.65 to 4.6 in head; 
eye 2.6 to 3; interorbital 2.8 to 3.25; mouth small; upper jaw but little 
in advance of the lower; maxillary-premaxillary border rather 
strongly curved; maxillary reaching anterior margin of pupil; premaxil- 
lary teeth all covered by the lower lip when mouth is closed, the series 
irregular; maxillary with 3 or 4 small teeth; lower jaw with 8 large teeth 
anteriorly and about 4 smaller ones at each side; teeth in the young 
pointed or tricuspid, very blunt or even paved in adult; gill-rakers 
moderate, 11 or 12 on lower limb of first arch; scales striate, 8 or 9 
before dorsal, 9 or 10 between dorsal and adipose; 9 or 10 longitudinal 
rows between base of dorsal and base of anal; origin of dorsal over base 
of ventrals, midway between tip of snout and tip of adipose, or slightly 
nearer the latter; adipose fin well developed, just behind vertical from 
