ANNOTATED LIST OF THE SPECIES 195 
Higenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 443; 
Regan, 1904, Trans. Zool. Soe. London, XVII, 246; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 410. 
The Andean streams of eastern Peru (Marcapata valley) 
188. CHAETOSTOMA MICROPS Giinther 
Hypostomus erinaceus Giinther, 1859, Proc. Zool. Soc. London, 420. 
Chaetostomus microps Ginther, 1864, Cat. Fish. Brit. Mus., V, 250; 
Steindachner, 1882 (1883), Denksch. Kix. Akad. Wiss. Wien, XLVI, 23, Rio de Huambo; 
Boulenger, 1887, Proc. Zool. Soc. London, 277, Canelos; 
Eigenmann and EKigenmann, 1889, Proc. Cal. Acad. Sei., (2), I, 46; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 448; 
Regan, 1904, Trans. Zool. Soc. London, XVII, 251, pl. xiv, fig. 3; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 410. 
Eastern Andes of Peru and Ecuador 
189. CHAETOSTOMA MACULATA Regan 
Chaetostomus maculatus Regan, 1904, Trans. Zool. Soc. London, X VII, 246, pl. xiv, fig. 4. 
Two specimens of 65 mm. length from ‘‘Rozmaiu”’, ‘“Upper Peru.” 
190. CHAETOSTOMA MARCAPATAE Regan 
Chaetostomus marcapatae Regan, 1904, Trans. Zool. Soc. London, XVII, 246, pl. xiv, fig. 1; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 410. 
Marcapata valley, southeastern Peru 
Known from the 100-mm. type collected by Ockenden. 
191. CHAETOSTOMA BREVIS Regan 
Chaetostomus brevis Regan, 1904, Trans. Zool. Soc. London, XVII, 247, pl. xin, fig. 3; 
FKigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 410; 
Pearson, 1937a, Proc. Cal. Acad. Sei., (4), XXIII, 96, Balsas, Tingo de Pauca, upper 
Maranon, possibly two species. 
Eastern fringe of Andes of Ecuador and Peru 
192. CHAETOSTOMA MOLLINASA Pearson 
Chaetostomus mollinasus Pearson, 1937a, Proc. Cal. Acad. Sci., (4), X XIII, 96, pl. xii, figs. 1 and 2, 
Balsas and Cajamarca. 
Both sides Central Cordillera, northern Peru 
Notable for the subcutaneous cushion of the snout, like that of a tugboat, 
extending and increasing forward from the interopercles. 
