1906.] NATURAL SCIENCES OF PHILADELPHIA. 433 



base of caudal, and 3 more on latter; 9 scales in an oblique series back 

 from origin of dorsal to lateral line; 7 scales from base of ventral to 

 lateral line; 16 scales before dorsal; pectoral If in head; ventral If; 

 least depth of caudal peduncle 24; snout 3f in head, measured from 

 tip of upper jaw; eye 3^; interorbital space 2f. No maxillary teeth. 

 Gill-rakers 10 + 14 on first arch, slender, pointed and much shorter 

 than filaments. Origin of dorsal nearer tip of upper jaw than base of 

 caudal. Color in alcohol brownish, back darker than side and lower 

 siu-face. Black humeral blotch conspicuous. Blackish dash at base 

 of caudal and on side of caudal peduncle also pronounced. Each 

 scale on side with a few brownish points or dots so that indistinct 

 longitudinal series are formed. Iris brownish with a darker ring. 

 Length 4^ inches. Headwaters of the Tocantius. H. H. Smith. 

 Also 3 other examples with same data showing: Head 3| to 3f ; depth 

 2^ to 2f ; D. Ill, 9; A. iv, 28, i to iv, 29, i, usually latter; scales 38 to 

 42 in lateral hne to base of caudal, and 3 more on latter; 9 scales in an 

 obhque series from origin of dorsal back to lateral line; 7 or 8 scales 

 from base of ventral to lateral line; 9 scales from origin of anal tc 

 lateral line; 15 or 16 scales before dorsal; total length of specimens 3 

 to 4y^ inches. 



Cope was evidently wrong in identifying this near Tetragonopterui 

 caudomaculatus Giinther which has only 26 anal radii. 



Also two in bad condition from the Peruvian Amazon. Prof. J^ 

 Orton. One of these has the humeral blotch large and pronounced. 

 Astyanax lacustris (Ltitken). 



Head 3f ; depth 2^; D. iii, 9; A. iv, 27, i; scales 35 in lateral line to 

 base of caudal, and 2 more on latter; 8 scales obliquely back from origin 

 of dorsal to lateral line, and 5 scales in same way from origin of adipose 

 dorsal ; 6 scales in a vertical series between base of ventral and lateral 

 line; 7 scales between origin of anal and lateral line; 14 scales before 

 dorsal; snout 4 in head, measured from tip of upper jaw; eye 2f; 

 maxillary 2f ; interorbital space 2f ; least depth of caudal peduncle 2J; 

 pectoral 1|-; ventral If. Maxillary toothless, and reaching front 

 margin of pupil. Rakers about 10 + 15, slender, and a little shorter 

 than filaments. In alcohol brownish, lower surface and sides paler or 

 whitish and everywhere more or less washed with silvery. An ellip- 

 soid blotch of blackish, in length about equal to orbit, on shoulder. 

 Base of caudal pale brownish and median caudal rays brownish. A 

 silvery streak from shoulder to caudal. Iris silvery-brassy. Length 

 2-j\ inches. Para, Brazil. De Schulte Buckow. Coll. J. C. Bre- 

 voort. 



