348 PROCEEDINGS OF THE ACADEMY OF [June, 



body, from level with upper edge of eye, silvery. A lateral silvered 

 streak from eye to caudal. Traces of a faint humeral and caudal 

 blotch. Dorsal and posterior edge of caudal brownish. Iris dull 

 orange. Length 2|-f inches. Type of Tetragoiwpterus pliodus Cope. 



An example labelled Montevideo, Uruguay, received from Cope. 



Cope was evidently in error in stating that the humeral and caudal 



spots were wanting, as even now the former is present though 



indistinct, and the median caudal rays are darker than the rest of the 



caudal fin. There is also a dull brownish shade at the base of the 



caudal. Outer portions of dorsal, caudal and anal brownish, not 



exactly "finely specked with black" as stated by Dr. Boulenger. 



Astyanax laticeps (Cope). 



Telragonopterus laticeps Cope, Proc. Amer. Philos. Soc. Phila., XXXIII. 

 1894 (January 5), p. 89, PI. 6, fig. 7. Nos. 21,852 (type) to 21,863 and 

 21,743 to 21,747, A. N. S. P., cotjTjes. Brazilian pro^^nce of Rio Grande 

 doSul. H.H.Smith. 



Predorsal region with a median keel and postdorsal with an obsolete 

 median ridge with one on each side. Preventral region apparently 

 rounded. Postventral region with median keel. Gill-opening ex- 

 tending a little before front of pupil. Rakers 9 + 12, slender, pointed, 

 and a little less than longest filaments. Isthmus narrow and com- 

 pressed. Color in alcohol pale brownish, back darker than sides 

 and lower surface, and a silvery band from shoulder to base of caudal, 

 its width less than orbit. Body, especially lower surface and side of 

 head, more or less silvered. A rounded dusky humeral blotch, and a 

 dusky dash at base of caudal continued out on median rays of latter. 

 Fins plain pale brownish. Iris brassy with a plain pale brownish ring. 

 Length 2|- inches (caudal damaged). Type. 



The other examples show: Head 2f to 3^; depth 2^ to 3; D. iii, 9; 

 A. IV, 18, I, rarely iv, 19, i; scales 30 to 35 in lateral line to base of 

 caudal, and usually 3 or 4 more on latter; 14 to 16 scales before dorsal, 

 usually 15; 6 to 8 scales in an oblique series back from origin of dorsal 

 to lateral line, usually 7; 6 or 7 scales from origin of ventral to lateral 

 line, usually 6; eye 3 to 3^ in head, from tip of upper jaw, usually but 

 little over 3; total length Iff to 2f inches. 



This species has been united with Astyanax fasciatus (Cuvier) by 

 Prof. Ulrey {Ann. N. Y. Acad. Sci., VIII, 1893-95, p. 283). A. 

 laticeps has three distinct small denticles at the base of the maxillary. 



Astyanax lineatus (Perugia). 



Tetragonopterus lineatus Cope, Proc. Amer. Philos. Soc. Phila., XXXIII, 

 1894 (January 5), p. 107. Near Chapada in Matto Grosso from the head- 

 waters of the Paraguay. H. H. Smith. 



Head 3^; depth 2f ; D. in, 9; A. iv, 25, i; scales 33 in lateral line to 



