122 
BULLETIN OF THE UNITED STATES FISH COMMISSION. 
First fully developed ray of dorsal flu lougest, last ray much shorter. When the lin is elevated the 
posterior margin is straight; when depressed it is somewhat falcate. Anal fin similar in shape. 
Pectorals pointed. Tips of ventrals reaching anal. Caudal deeply forked, the lobes pointed. 
Color silvery; a dark lateral band, the width of a scale, extending from tip of snout, through 
eye to base of caudal, where it ends in an elongate black spot; body above lateral band stippled with 
black; the dots grouped closely together ou top of head and in a narrow dorsal band extending from 
occiput to insertion of dorsal, in a sharply defined black line along base of dorsal fin, and also on 
edges of dorsal scales. Body below dark band immaculate except a dusky line along base of anal fin. 
All of the fin rays dusky, especially the j>artly developed caudal rays, which are noticeably darker 
than the others. 
Measurements of three specimens of Notropis rasconis. 
Measurements. 
Locality: Rio Verde, 
nearRascon. 
Length of body in millimeters 
43 
44 
43 
Depth of body expressed in hundredths of length 
28 
274 
24 
Depth of caudal peduncle 
11 
11 
11 
26 
26 
25 
Distance from snout to occiput 
23 
23 
24 
Width of interorbital space 
8 
8 
8 
8 
lh 
8“ 
8 
84 
55' 
8 
Distance from snout to dorsal lin 
54 
52 
Height of longest dorsal rays 
23 
24 
24 
Distance from snout, to anal iin 
69 
69 
68 
Height of longest anal rays 
21 
19 
19 
Distance from anal to caudal iin 
33 
32 
36 
Lengtli of caudal fin 
29 
29 
30 
Length of pectoral iin 
20 
20 
21 
Distance from snout to ventral fin 
51 
52 
51 
Length of ventral fin 
17 
174 
18 
Number of rays in dorsal fin 
8 
8 
8 
Number of rays in anal lin 
8 
8 
8 
Number of rays in pectoral fin 
12 
12 
12 
Number of scales before insertion of dorsal iin 
15 
15 
15 
Number of scales in lateral line 
1 
33 
34 
34 
11. Notropis calientis Jordan & Snyder, new species. Fig. 4. 
Type No. 6193, L. S. jr. Univ. Mus. 
Collected in the Rio Yerde, at Aguas Calientes, on January 9, 1899, by J. O. Snyder. 
Head 3.66 in length; depth 3.33; eye 4 in head; snout 4; interorbital space 2.66; depth of 
caudal peduncle 2.40; height of dorsal 4.66 in length; anal 5.75; length of pectoral 5.66; ventral 6; 
caudal 3.83; scales in lateral line 33; be- 
tween dorsal and occiput 15 ; between 
dorsal and ventral fins 10. D. 8. A. 7. 
Body deep and wide, deepest part 
anterior to insertion of dorsal ; caudal 
peduncle long and slender; snout blunt, 
rounded; mouth oblique; jaws equal; 
maxillary reaching to a vertical from pos- 
terior nostril. Teeth 4-4, slender, hooked, 
grinding surface narrow, absent on small- 
est tooth. Gillrakers short, blunt; 9 on Fig. 4. — Notropis calientis Jordan .V Snyder, new species. Type, 
first arch. Intestinal canal short, with 
but 1 convolution ; peritoneum white, scales large, not notably deeper than long. Lateral line incom- 
plete, extending only as far as posterior edge of pectoral. Dorsal fin rounded, the second, third, and 
fourth rays longest. Anal fin similar in shape ; ventrals rounded, extending to vent ; inserted directly 
under dorsal. Pectorals rounded. Caudal forked, the lobes rounded. 
Color silvery, an indefinite dark band extending from tip of snout to end of caudal peduncle; the 
band distinct on snout and caudal peduncle; broader and almost obsolete on middle of body; top of 
head and a narrow band on median dorsal part ofJbody dark ; ventral parts of body immaculate, except 
a narrow, dark band extending along base of anal and ventral part of caudal peduncle; chin white; 
scales on upper parts, with dark edges; dorsal and caudal fins slightly dusky; other fins lighter. 
This species is of small size, the mature males measuring about 34 mm. in length of body; the 
females 43. The males are more slender and have a little less dark color on the body. The affinities of 
