136 Annals of the Carnegie Museum. 



and a longitudinal caudal stripe extending to the end of the 

 rays and fading out anteriorly. Head Z)i~Z}i > depth 3-3 J/3 ; 



scales 5-33-4. A. 16-18 .jenynsi (Steindachner) 48. 



PP. Middle caudal rays not black. 

 S. Scales in lateral line 34-38. 



T. A. 19 or 20. 12 Almost colorless ; caudal rays sometimes dusky, 

 a grayish lateral band. Pectorals reaching % to ventrals, 

 ventrals % to anal. Maxillary, with 2 teeth, reaching to 

 eye. Head 4, depth z\-l% '■> scales 4 or 5~35 to 3 8 "4- 



moenkhausi (Eigenmann & Kennedy) 49. 

 TT. Anal 17-18. Yellowish above, white on the sides; lateral 

 band plumbeous above, silvery below ; a plumbeous 

 humeral spot. Head 4^ to 4I/5 ; eye lyi in head ; 

 depth 33-3 1 • Lateral line 34-36. Dorsal band, large 

 part of anal, the body near it and the median spot of the 



caudal more or less red rubropictus (Berg) 50. 



TTT. Anal 18 ; scales 37 or 38 ; depth 3! ; head 4 5 ; plumbe- 

 ous, fins dusky ; pectorals reaching ventrals ; ventrals 

 nearly to anal ; caudal lobes rounded ; snout blunt, lower 

 jaw distinctly shorter than upper ; a faint, humeral spot, 

 mouth very small, maxillary not reaching eye ; eye 3^ in 

 head; interorbital very convex, less than 3 in head; 

 depth of caudal peduncle little less than half the greatest 



depth eigenmanni Evermann & Kendall 51. 



SS. Scales 5-31-3. Silvery lateral band ; a diffuse caudal spot; no 

 humeral spot. Head 3^ ; depth 2^. A. 19. 



paucidens (Ulrey) 52. 



64. Astyanax pelegrini Eigenmann (Plate XL, Fig. 3). 



Pazcilurichthys multiradiatus Eigenmann, Proc. Phila. Acad. Sci., 

 1903, 521. (Not Tetragonopterus multiradiatus Steindachner.) 



Steindachner describes his multiradiatus as having depth 2 ; head 

 3.6 ; eye 3 in head = interorbital ; A. 40-41 ; scales 10-41 to 42-9. 



Inasmuch as Steindachner' s specimens were 2 inches long and their 

 depth cannot be ascribed to old age, they should very probably be 

 classed with typical Tetragonopterus. 



Several specimens from the basin of the Paraguay, mentioned in 

 the paper quoted above, and an additional one (380) from Bahia 

 Negra, have the following formula: Depth 2-2.5; head 4-4.5; A. 

 41-45 ; scales 9 to 11-45 to 52-7 to 8. 



These represent a species certainly distinct from the multiradiatus 

 of Steindachner. It may be identical with Cope's hauxewellianus 

 from Peru, from which it differs in the number of qnal rays, there 

 being 47 in hauxewellianus. 



12 26 in one specimen. 



