338 



PROCEEDINGS OF THE ACADEMY OF 



[June, 



diameter. Isthmus long and narrowly triangular. Each scale with 

 a number of stria?. Color in alcohol dull brassy-brown with silvery 

 reflections, back slightly more brownish with a leaden tint. A humeral 

 blotch of grayish about equal to orbit in size. Top of head brownish. 

 Fins pale brownish, dorsal and caudal a trifle darker than others. 

 Iris dull brassy-brown. Length (caudal slightly damaged) 5 inches. 

 Type. 



The other examples, including those later reported by Cope, show: 

 Head B^ to 4; depth 3 to 3f ; D. ii, 8; A. in or iv, 23, i to 27, i; scales 

 about 50? (squamation damaged) to 55 in lateral line to base of caudal, 

 and 2 or 3 on latter; 23 to 25 scales before dorsal; 11 scales in an 

 oblique series back from origin of dorsal to lateral line ; 8 or 9 scales in 

 a vertical series between lateral line and origin of anal ; eye 3j to 4 in 

 head ; total length 2^ to 4f inches. 

 Astyanax phcenioopterus (Cope). Fig. 26. 



Tetragonopterus phoenicopterus Cope, Proc. Acad. Nat. Sci. Phila., 1871 (1872), 

 p. 261. Nos. 8,093 (type) to 8,128, A. N. S. P., cotypes. Ambyiacu 

 River, Equador. John Hauxwell. 



Gill-opening extending forward about opposite anterior margin of 



[styanax phcenicupterus (Cope). 



pupil. Rakers small and inconspicuous, about 7? on lower part of 

 first arch. Filaments short. Isthmus compressed and narrow. 

 Color in alcohol dull brown, more or less silvery. Side of head silvery. 



