ANNOTATED LIST OF THE SPECIES 197 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 411; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 239. 
Xenocara hoplogenys Regan, 1904, Trans. Zool. Soc. Londen, XVII, 255. 
Chaetostomus alga Cope, 1871, Proc. Acad. Nat. Sei. Phila., XXIII, 287, Rio Ambyiacu. 
Chaetostomus malacops Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXIII, 287, pl. v, fig. 2, 
Rio Ambyiacu; 
Eigenmann and Eigenmann, 1889, Proc. Cal. Acad. Sci., (2), I, 46; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 443. 
Chaetostomus tectirostris Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXIII, 288, pl. xv, fig. 2, Rio 
Ambyiacu; 
Eigenmann and Eigenmann, 1889, Proc. Cal. Acad. Sei., (2), I, 46; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sei., I, 442. 
Chaetostomus leucostictus Steindachner, doubtful, 1882 (1883), Denksch. KIk. Akad. Wiss. Wien, 
XLVI, 7, Rio Huallaga, 1 specimen. 
15370, 1, 110 mm., Iquitos, Amazon, Allen, November, 1920. 
15371, 1, 97 mm., creek, Rio Morona, Allen, October, 1920. 
195. ANCISTRUS BUFONIUS (Cuvier and Valenciennes) 
Hypostomus bufonius Cuvier and Valenciennes, 1840, Hist. Nat. Poiss., XV, 511, Rio Apurimac, 
elevation 2000 meters. 
Chaetostomus bufonius Kigenmann and Eigenmann, 1889, Proc. Cal. Acad. Sci., (2), I, 46; 
Eigenmann and Higenmann, 1890, Occ. Papers Cal. Acad. Sei., 1, 444. 
Xenocara bufonia Regan, 1904, Trans. Zool. Soc. London, XVII, 268. 
Ancistrus bufonius Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 411. 
Andes of Peru and Bolivia, moderate elevations 
15367, 17, 37-106 mm., La Merced to Puerto Bermudez, Allen, July, 1920. 
15368, 1, 68 mm., La Merced, Allen, July, 1920. 
196. ANcisrRUs occLor Eigenmann (and Myers) 
Plate X, figs. 1 and 2 
Ancistrus occloi Eigenmann (in Myers), 1928, Ann. Mag. Nat. Hist., (10), IT, 86. 
Upper Urubamba river 
15067, 2, the larger the type, 115 mm., Ollantaitambo, Heller. 
Similar to A. bufonius. Taken at 9000 feet elevation on the Urubamba. 
Named for the wife of the Inca Manco, Occlo. 
The type measures 89 mm. to the base of the plates at the origin of the caudal 
fin; head 36 mm., width of head 33 mm., depth of head at occipital process 15 mm., 
interorbital 14 mm., ramus of mandible 9 mm., snout 22 mm., orbit 3.5 mm.; lower 
caudal lobe 27 mm., upper lobe 24 mm.; base of dorsal 18 mm., distance between 
dorsal and adipose 14, length of dorsal spine 20 mm.; length of pectoral spine 23 
mm.; length of ventral spine 22 mm.; lateral plates 25; D. I, 7; A. I, 3; length of 
caudal peduncle 25, its depth 9; interopercular spines 13-14, longest interopercular 
spine 9. 
Eleven or twelve plates between anal and caudal fins, six or seven between 
