300 PROCEEDINGS OF THE ACADEMY OF [June, 



keel and a similar one on each side. Color at present in alcohol pale 

 greenish-brown, clue most likely to preservative. Back a little darker. 

 Fins all plain, except dorsal, which is marked with a large blackish 

 blotch nearer bases of median rays. Iris deep brown. Length 4|- 

 inches (caudal damaged). 



Cope's statements that ' ' the depth at the front of the dorsal fin is 

 one-third the length of the caudal ' ' and ' ' the length of the head is one- 

 fourth the same" are impossible. He evidently intended to refer to 

 the body. 



Curimata gilbert Quoy and Gaimard. 



Curimatus gilherlii Cope, Proc. Amer. Philos. Soc. Phila., XXXIII. 1894 

 (January 5), p. 93. Many examples from the Brazilian proWnce of Rio 

 Grande do Sul, probably at Sao Joao. H. H, Smith Coll. 



All have the dark caudal spot evident, and in the larger ones it is very 

 distinct. In some small ones it is preceded laterally and medianly 

 by an irregular series of small blackish spots of uneven size. In others 

 this is connected by a dusky streak, fading out anteriorly and enclosing 

 the lateral line. In fact the species shows considerable color variation. 

 Also a large uniformly colored example from Campos, Brazil. The 

 proportions, etc., of all the examples range as follows: Head 3 to 31; 

 depth 2f to 3; D. iii, 9; A. iii, 7, i; scales 33 to 38 in lateral line to base 

 of caudal and 3 or 4 continued on the latter; 6 or 7 scales, usually 6, 

 obliquely back from origin of dorsal to lateral line; 6 scales obliquely 

 between lateral line and origin of ventral; 14 to 16 scales before dorsal; 

 total length of specimens ranging from 2\ to 8^ inches. 



[ PELTAPLEURA subgen. nov. 



Type Salmo ajprinoides Linnaeus. 



Scales on costal region enlarged, much larger than elsewhere on body, 

 and converging posteriorly so as to form even series with the others. 



{UiXrr), a smah light shield, here used with reference to the scales; 

 Tzkeupd^ the side or rib.) 



Curimata cyprinoides (Linna>us). Fig. 6. 



Curimatus cyprinoides Cope, Proc. Acad. Nat. Sci. Phila., 1871 (1872), p. 

 258. Ambyiacu River, Equador. John Hauxwell. 



Of 11 examples 4 before me have the squamation fairly perfect. 

 They show the scales in the lateral line ranging from 45 to 48 when 



