ANNOTATED LIST OF THE SPECIES 373 
specimens were implied. On Lake Titicaca I heard it called carache blanco to 
differentiate it from O. miilleri. Elsewhere the name challhua (meaning fish) 
appears to be sufficient. According to Garman carache, like bova, is a term of 
opprobrium, signifying also scab; a scabby sheep and its parasite both bear the 
name. Pentland reported from Corocoro the name purus, and locally I was given 
the name corbinita (of course borrowed). 
One specimen of 63 mm. contained a tapeworm of more than LOO mm. 
O. agassizii, and doubtless other related species, were frequently collected, 
upon which the frontal region bulged out in a very prominent manner. I dis- 
sected many of these in the fresh state, and found that the bulging affected the 
cranial bones, leaving an unusually large cranial cavity, and that the cavity was 
inhabited by swarms of minute larval trematodes, all about the brain. Many 
hundreds were collected and prepared by parasitological methods for the University 
of Illinois. Cope’s description of his Orestias frontosus leaves no doubt in my mind 
that he was dealing with parasitized specimens of agassizi?. 
Garman found a number of specimens in Lake Umayo which he considered 
a ‘‘variety,”’ and which he named O. affinis. They were small (up to 31 inches), 
short and stout, light olive, but ‘‘spotted, freckled, blotched, and streaked”’ in the 
young, predorsal scales irregular, teeth in a band, outer series larger. In this 
description he forecast all the varieties soon to appear under the pen of Pellegrin. 
Pellegrin described four ‘‘varieties.”” They may be left at that, since they 
point out certain more or less definite types of color variation. His four categories 
are as follows: 
Var. inornata, with uniform, solid greenish color and no punctulations on the 
fins. 
Var. typica (from Corocoro, type locality of the species); color as in the pre- 
ceding, but dorsal and caudal finely punctulate; a dark lateral streak, at least on 
the caudal peduncle. 
Var. seneschali, with general color as in inornata, but with about ten dark 
blotches above the lateral line. 
Var. crequii, with many small, deep, irregular blotches in 3-5 rows, parallel 
and longitudinal; they often touch, or coalesce along the lateral line; D. and C. 
punctulate; A. and P. whitish. 
My examination of many hundred specimens brought to light all the types 
described by Pellegrin. Seneschali was rarely met with, the other three very 
commonly. But Iam unable to accord them taxonomic value in any case.  Inter- 
mediates were also frequent, obliterating the outlines between varieties. 
All the largest specimens could be assigned to ‘nornata. The smallest speci- 
men of ¢nornata was 58 mm. long, and that was very unusual, few of them falling 
under 70-80 mm. Those found to be sexually mature were almost always ‘nornata. 
All the small or minute specimens were spotted, usually crequii-like. The specimens 
of var. typica were usually intermediate in size. 
Specimens taken in the red waters of muddy streams during the rainy season 
invariably were reddish in appearance, lightly pigmented, from saffron to pale 
