26 PROCEEDINGS OF THE NATIONAL MUSEUM. vol. xxxm. 



No. 34597. Two specimens, Mexico, collected by A. Duges. A. 

 27-28. 



No. 44641. Five specimens, Las Moras Creek, Texas, collected by 

 E. A. Mearns. 



No. 49076. Thirty-five specimens. Fort Clai-k, Texas, collected by 

 E. A. Mearns. 



No. (?). Four specimens, (i) collected by C. B. Kennedy. Type. 



No. (?). Six specimens, near Monterey (?), collected by D. N. 

 Couch. 



The anal rays in specimens at random from different localities were 

 as follows: 



Two have 20 rays; two have 21; ten have 22; seventeen have 23; 

 seventeen have 24; two have 25; average 23. 



Astyanax fischeri Steindachner. 



Through the courte.s}- of Prof. C. H. Gilbert I have been able to 

 examine a large number of specimens from the Pacific slope of Panama. 

 These specimens present the following characteristics: 



A vertical humeral spot bordered in front and behind by a light 

 area; a second vertical .spot behind the light area; a lateral band silvery 

 or plumbeous ending in a caudal spot on the last (5) rows of scales, 

 not continued on the middle caudal rays; caudal and anal narrowly 

 margined with dusky; all markings more or less distinct. 



Maxillary with 1 to 3 teeth; eye 3-3.2 in head, 1-1.25 in the inter- 

 orbital, distinctl}" longer than snout; maxillary equals length of snout. 

 Dorsal behind the ventrals. Head, 4; depth, 2.4-2.7; scales, 6i-7i; 

 34 to 37-5i to 6i; A. 23 to 26. 



The scales and anal in a number of specimens are as follows: 

 Scales 7-37-6; A. 26. Scales 7-36-6; A. 28. 



Scales 7-35-6; A. 25; female. Scales 7-37-5; A. 27. 



Scales 7-37-6; A. 25. 

 Scales 7-35-5; A. 27; male. Scales 6-35-5; A. 23. 



Scales 7^35-6; A. 25. 

 Scales 7-35-5; A. 25. Scales 7-36-6; A. 25. 



In one small specimen the scales are 7-35-7; A. 27. 



One specimen, Panama, presented by Capt. J. M. Dow. 



No. 16678. Rio Frijole, Panama, Bransford collection. A. 24-29, 

 usually 25-27. 



Nos. 16680, 16681. Empire Station, Panama, Bransford collection. 

 A. 24-27; scales 6 or 7—34 to 37-5. 



Astyanax emperador, new species. 



Type. — Cat. No. 55651, U.S.N.M. A specimen 52 mm. to base of 

 caudal; Empire Station, Panama. 



Cotypes. — No. 55651c/, U.S.N.M. Two specimens 37-35 mm. long to 

 base of caudal. Empire Station, Panama, Bransford collection. 



