ANNOTATED LIST OF THE SPECIES 153 
Pellegrin, 1904, Bull. Soc. Zool. France, X XIX, 91; 
Pellegrin, 1907, Poiss. Lacs Hauts Plat. Amér. Sud, 17, Lago Poopé, Pazna. 
Pygidium rivulatum Eigenmann and Eigenmann, 1889, Proc. Cal. Acad. Sei., (2), I, 51, Cuzco, 
Moho, Puno, Lake Titicaca; 
Eigenmann and Bean, 1907, Proc. U.S. Nat. Mus., XX XI, 771; 
EKigenmann, 1918, Mem. Carnegie Mus., VII, 301; 
Pearson, 1937a, Proc. Cal. Acad. Sci., (4), X XIII, 94, Cajamarca. 
?Trichomycterus incae Cuvier and Valenciennes, 1846, Hist. Nat. Poiss., XVIII, 496, Cuzco, Rio 
Guatanal. 
Trichomycterus gracilis Cuvier and Valenciennes, 1846, Hist. Nat. Poiss., XVIII, 497, Rio Azangaro 
near Guasacona; Rio Guatanai, Cuzco; Lago Compucila near Cuzco; 
Cope, 1877, Proc. Amer. Phil. Soc., XVII, 681, Tinta. 
Trichomycterus barbatula Cuvier and Valenciennes, 1846, Hist. Nat. Poiss., XVIII, 498, Guasacona; 
Pontezuela, near Coroico, Bol. 
Trichomycterus pentlandi Castelnau, 1855, Anim. Amér. Sud, Poiss., 49, pl. xxiv, fig. 1, “lake com- 
municating with the Ucayali.” 
Trichomycterus pictus Castelnau, 1855, Anim. Amér. Sud, Poiss., 59, pl. xxiv, fig. 2, Lago Titicaca. 
Trichomycterus dispar Garman (non Tschudi), 1875, Bull. Mus. Comp. Zool., III, 275, Lago Titicaca; 
Pellegrin, 1904, Bull. Soe. Zool. France, XXIX, 91; 
Pellegrin, 1907, Poiss. Lacs Hauts Plat. Amér. Sud, 7, Lago Titicaca. 
Trichomycterus pardus Cope, 1874, Proc. Acad. Nat. Sei. Phila., XX VI, 132. 
Central plateaux of southern Peru and adjacent highlands 
13833, 1, 98 mm., Tirapata, 13000 feet, purchase from Rosenberg. 
13750, 2, 123 and 140 mm., Ollantaytambo, Rio Urubamba, E. Heller. 
15063, many, 30-82 mm., Media Luna, Rio Urubamba, Eigenmann, November, 1918. 
15064, many, , Calacoto, Rio Desaguadero, Bolivia, Allen, 1919. 
15065, 3, up to 300 mm., Puno Market, L. Titicaca, Allen, December, 1918. 
15066, 14, 42-150 mm., Ollantaytambo, R. Urubamba, Eigenmann, November, 1918. 
15068, 74, 106-156 mm., Saylla, Cuzco valley, Eigenmann, November, 1918. 
15072, 7, 104-122 mm., Rio Urubamba, Eigenmann, November, 1918. 
15073, many, 40-133 mm., Angostura, Cuzco valley, Eigenmann, November, 1918. 
15074, many, 30-125 mm., Saylla, Cuzco valley, Eigenmann, November, 1918. 
16058, 2, about 400 mm., Pto. Acosta, L. Titieaca, Allen, December, 1918. 
16059, , , Lago Titicaca, Puno, Allen, 1918. 
17795, 3, 60-69 mm., Torontoy, R. Urubamba, Eigenmann, November, 1918. 
17796, many, 386-178 mm., Lago Ureos, Eigenmann, November, 1918. 
17797, many, 39-215 mm., Aguas Calientes, R. Vileanota, Allen, January 1919. 
17798, many, 41-90 mm., Lago Verde, R. Vileanota, Allen, January, 1919. 
17809, many, 32-102 mm., lagoon, Huaypo, Eigenmann, November, 1918. 
17810, many, 31-95 mm., Poroy, Eigenmann, November, 1918. 
17811, , R. Huatanay, Eigenmann, November, 1918. 
17812, 26, 39-73 mm., Iscuchaca, R. Huatanay, Kigenmann, November, 1918. 
17813, many, 52-96 mm., Angostura, R. Huatanay, Higenmann, November, 1918. 
17814, many, 54-179 mm., Hermita, Oropesa, Higenmann, November, 1918. 
17815, 5, 37-58 mm., R. de Langui, Eigenmann, November, 1918. 
17816, 26, 24-86 mm., R. Occopata, Eigenmann, November, 1918. 
Of the specimens numbered 17810 and 17816 none has the protracted ray of 
the pectoral well-developed, suggesting atochae. They are also mostly small 
and not robust. 
Generally known as the suche (elsewhere locally called bagre, in a generic 
sense; also boga and maur?). 
Our largest specimens were taken near Moho on Lake Titicaca, at Puerto 
Acosta, by means of a home-made wicker lead-in trap resembling the lobster-pot, 
