202 THE AMERICAN CHARACIDAE. 
Seales very regular, no interpolated rows of scales below the lateral line; 
the third row below the lateral line runs to the end of the anal, the fourth to 
the middle of the anal, the fifth to the sides over the first few anal rays; lateral 
line nearly straight; caudal lobes naked; anal with a sheath of a single row 
of seales; a large axillary scale; lateral line variable. 
Silvery, a silvery lateral band; a faint humeral spot crosses the third scale 
of the lateral line; a large conspicuous triangular caudal spot extending on 
the bases of the middle caudal rays, not to their middle. Caudal lobes with 
cherry spots at the base becoming yellow toward the tip. 
22. HyYPHESSOBRYCON SANTAE (Higenmann). 
Plate 27, fig. 3; Plate 79, fig. 3, 3a. 
Hemigrammus santae ErGENMANN, Proc. U.S. N. M., 1907, 38, p. 16 (Lagoa Santa). 
Tetragonopterus rivularis interrupta Liitken, Vidensk. selsk., 1875, 12, p. 215 (Lagoa Santa). 
Hyphessobrycon santae ExGENMANN, Rept. Princeton univ. exped. Patagonia, 1910, 3, p. 437; Exis, 
Ann. Carnegie mus., 1911, 8, p. 158 (Sete Lagoas; Mogy das Cruzes). 
Hasirar.— Paraguay; Southeastern Brazil. 
Specimens examined. 
Number of Size 
Catalogue number — specimens in mm. Locality Collector 
55652 ' Cotypes 2 Lagoa Santa Reinhardt 
10182 I. 4 Villa Riea, Colonia Anisits 
Gonzales 
3033 C. 6 33-42 Sete Lagoas Haseman 
3034 C. 1 58 Mogy das Cruzes Haseman 
Head 3.5; depth 2.6-3; D. 11; A. 20-22; scales. 5-32-44, to 6-30-3.5, 
and 5-33-3.5; eye 2.25 in the head, equals the interorbital. 
Compressed, deepest on the vertical from the fourth scale in front of the 
dorsal; depth of head at the base of the occipital process 1.33 in the greatest 
depth. Preventral region rounded, without a complete series of median scales. 
Predorsal region rounded, with regular median series of 11 scales. 
Occipital process 6 in the distance from its base to the dorsal, bordered 
by 3.25 to 3.5 scales. Interorbital convex. Maxillary 3 in the head, mandible 
2.5. Second suborbital leaving a naked margin behind and below. Premaxil- 
lary with four large 4- to 7-pointed teeth in the inner and three 3- to 5-pointed 
1U. S. National Museum. Cotypes of H. interrupta and of santae. 
