ANNOTATED LIST OF THE SPECIES 355 
474. ORESTIAS INCAE Garman 
Plate XVII, fig. 1 
Orestias incae Garman, 1895, Mem. Mus. Comp. Zool., XTX, 155; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 461; 
Evermann and Radcliffe, 1917, Bull. U. S. Nat. Mus., no. 95, 42. 
Lago Titicaca 
3948 MCZ, 1, 55 mm., cotype, Moho, Lake Titicaca, Garman, January, 1875. 
As in the case of O. olivaceus the kind loan of this specimen enabled me to 
retain O. incae as a valid species, since my collections unfortunately do not include it. 
The single specimen before me is extremely short, high, and compressed. The 
dorsal profile is rather uniformly convex from the oeciput to the end of the dorsal 
basis, thence becoming sharply concave on the caudal peduncle; slightly concave 
on the head; ventral contour equally rounded from the vertical through the opercle 
to the caudal peduncle. Depth greater than the length of the head, 2.7 in the length 
of the fish without caudal fin, the point of greatest depth farther back than in any 
other species, being about midway of the body and toward the extremity of the 
pectoral (not at the first dorsal rays as stated by Garman), tapering uniformly 
toward head and tail. Head unusually rounded in cross-section; mouth oblique, 
lips fleshy, teeth scarcely perceptible; eye moderately large, greater than the snout; 
3.75 in the head, which is 3.3 in the length. Caudal peduncle slender, 4 in the 
length of the fish. 
(Garman) D. 16-18; A. 16-18; P. 18-20. 
Scales small, striate, without granulations, belly completely scaled. 
Many scattered red-brown chromatophores about over the body, and broken 
rows of fine markings on all fins. 
Not at all closely allied to albus and luteus as believed by Garman, except 
as to the short form and the colors, but nearer to the primitive stock and to hum- 
boldtii, lacking the specialized forms and scales of both the major divisions of the 
genus. Placed here with little hesitancy, since it differs clearly from the specimens, 
which I have identified as humboldti, in the much less slender form, greater depth 
rounded head, more oblique mouth with fleshy lips, and teeth less evident. 
475. ORESTIAS HUMBOLDTI Valenciennes 
Plate XVII, fig. 2 
Orestias humboldti Cuvier and Valenciennes, 1846, Hist. Nat. Poiss., XVIII, 233. 
Orestias cuviert Eigenmann and Higenmann, 1891, Proc. U.S. Nat. Mus., XIV, 65; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 461. 
Lake Titicaca 
16078, 31, 53-100 mm., Moho bay, Allen, December, 1918. 
This species was collected for Valenciennes by Pentland, and has not since 
been collected. My specimens from Moho bay were long mistaken for Garman’s 
incae until one of Garman’s cotypes was sent me from the Harvard Museum, 
