Evermann and Radcliffe — A Cyprinodont from Peru. 169 



and caudal poduncle have light centers with dusky edges. Some of the 

 La Fundicion specimens have a broad indistinct dark band on sides, 

 margined below with yellow; dorsal and anal dusky, without black areas 

 or blotches; base of dorsal usually jet black; caudal and pectoral dusky 

 to lightish, axil and base wliite or dusky white, margined with dusky. 

 All of our specimens over (i.O cms. long have this coloration, and are 

 Pellewrin's var. inornata. 



Two specimens, 4.1 to 4.3 cms. long, from Lake Angascancha resemble 

 closely the preceding but differ in having a black line from opercle to base 

 of caudal, mo.st distinct on caudal peduncle; body below line yellowish 

 white with occasional very slight traces of dusky ; dorsal and caudal with a 

 few irregular black areas on rays near base, giving the lin a punctulated 

 appearance. These agree quite closely with the description and figure of 

 Pellegrin's var. Ujpica. 



Thirteen specimens, 2.8 to o.O cms. long, from Lake Angascancha differ 

 from those just described in having the horizontal line darker and a row 

 of al)Out a dozen irregular black spots along each side of the back; occa- 

 sionally two i)f these meet forming a saddle across the back ; below these 

 and alternatiug with them in some specimens there is a second row ; the 

 dark blotches on dorsal and caudal are more pronounced and extend 

 nearer to the free margin. These agree (piite closely with Pellegrin's 

 description and figure of var. senechali. 



Seven specimens, o.4 to (kO cms. long, from Lake Angascancha and W 

 specimens, 2. 6 to 5.9 cms. long, from La Fundicion have the ground color 

 nuich lighter with '?> or 4 rows of irregular dusky or black blotches on 

 sides, those replacing the horizontal line often more or less coalescent 

 especially posteriorly; in some specimens the (Ljrsal and caudal are only 

 lightly dotted with dusky, in others the spots are almost jet black ; pectoral 

 and anal as a rule are much lighter colored in these specimens. The 

 fishes taken at Lake Angascancha are much darker than those from 

 La Fundicion. Pellegrin's description and tigure of var. crequii a.pY>ears 

 to agree very well with these. 



Ten specimens, 2.4 to 5.4 cms. long, from Lake Angascancha and 42 

 specimens, 2.0 to (5.0 cms. long, from La Fundicion are intermediate 

 between the first and fourth lots just described, i. e., between Pellegrin's 

 var. inornata and var. crequii. Some of these show very obscure traces 

 of spots on l^ack, and have a few dusky spots on dorsal and caudal ; others 

 differ from var. inornata only in having a few spots either on dorsal or 

 caudal or on both. There are so many varying stages among these that 

 ' we are unable to separate them. 



Two specimens, 3.7 and 4.4 cms. long, from Lake Angascancha and 2 

 specimens, each 4.3 cms. long, from La Fundicion are intermediate be- 

 tween the second and third lots described, showing posteriorly very 

 obscure traces of two or three dusky blotches. These are intermediate 

 between var. typica and var. senechali of Pellegrin. 



Forty-seven specimens, 4.2 to 5.9 cms. long, from Lake Angascancha and 

 2 specimens, 4.0 and 4.6 cms. long, from La Fundicion are intermediate be- 

 tweeen our third and fourth lots, i. e., between Pellegrin's var. senechali 



