360 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
14.5 (15.5); longest dorsal ray 23.5 (25.6); longest pectoral ray 20.5 
(21.5); longest pelvic ray 15.1 (16.1); longest ray of upper caudal lobe 
27.8 (-—); longest ray of lower caudal lobe 28.9 (28.4); distance from 
tip of snout to dorsal origin 49.0 (49.0); snout to anal origin 65.4 
(65.4); snout to adipose origin 85.1 (86.4); snout to pectoral insertion 
24.3 (26.2); snout to pelvic insertion 46.2 (48.0); snout to anus 60.7 
(61.4); distance from dorsal origin to midcaudal base 56.2 (59.3). 
The following counts were made, respectively: Dorsal rays ii, 9 
(ii, 9); anal 11, 24 (1, 25); pectoral 1, 18-4, 13 G, 138-1, 13); pelvic i, 7— 
i, 7 G, 7-1, 7); branched rays of caudal fin 17 (17); gill rakers on first 
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Ficure 54.—Astyanax venezuelae, new species: Holotype, U.S.N.M. No. 121449, 86.5 mm. 
in standard length. 
gill arch — — (11+1-+14); scales from upper edge of gill opening to 
midcaudal fin base 40 (40); scales from dorsal origin to lateral line 
8 (9), and from lateral line to pelvic base 6 (7); scales in front of 
dorsal to tip of supraoccipital process 12 (12), and along side of that 
bony process 4 (4); zigzag scale rows around caudal peduncle 16 (18); 
number of teeth in outer row of the premaxillary — — (5-5; 4—5; 5-5; 
5-5; 5-5), and in inner row of premaxillary always 5 or each side; 
proximal end of maxillary with one tooth; all teeth 3- to 5-pointed, 
middle cusp longest. 
- Body compressed, its depth about 2.6 to 2.8, head 2.8 to 2.9, snout 
to dorsal 2.1 to 2.2, all in the standard length; origin of dorsal closer 
to tip of snout than to midcaudal fin base by more than diameter of 
eye; second suborbital not quite meeting the preopercle so that a 
narrow naked space occurs around it; mouth evenly rounded, not 
pointed, the snout about equal to the eye; preorbital with a shallow 
depression to receive the posterior part of the maxillary; interorbital 
space convex; mouth when closed on level of lower edge of pupil; 
lateral line a little decurved anteriorly, complete, the scale rows 
