ANNOTATED LIST OF THE SPECIES 117 
61. PrRUGIA AGASSIZIL (Steindachner) 
Pinirampus agassizii Steindachner, 1876, Sitzb. KIX. Akad. Wiss. Wien, LX XIV, 57, pl. xii, Para. 
2 agassizvi Kigenmann and Higenmann, 1890, Oce. Papers Cal. Acad. Sei., I, 183. 
Perugia agassizii Kigenmann and Norris, 1900, Revista Mus. Paulista, IV, 355; 
Higenmann, 1922, Mem. Carnegie Mus., IX, 34. 
Luciopimelodus agassizi Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 383. 
The Amazons 
15657, 1, 245 mm., Iquitos, Allen, 1920. 
15658, 2, 169 and 175 mm., Maranon above mouth of Huallaga, Allen, October, 1920. 
15736, 1, 335 mm., Rio Huallaga, Yurimaguas, Allen, November, 1920. 
15758, 5, 204-275 mm., Rio Ucayali, near Orellana, Allen, August, 1920. 
15774, 1, 420 mm., Manaos, Allen, December, 1920. 
Subfamily: AUCHENIPTERINAE 
Pimelodidae with both maxillary and mental barbels and lacking lateral plates; 
eill-membranes united to each other and to the isthmus; nares remote and without 
yarbels; free air-bladder, cervical vertebrae modified, but without lateral processes. 
barbels; free air-bladd ervical vertel lified, but without lateral e 
Genus 27: CENTROMOCHLUS Kner 
Centromochlus Wner, 1857 (1858), Sitzb. Kix. Akad. Wiss. Wien, X XVI, 430; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sei., I, 266; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 395; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 197. 
Type: Centromochlus megalops Kner 
Peru to Guianas and Rio de Janeiro 
Mental barbels arranged by pairs; adipose fin shorter than the short anal 
which has only 7-11 rays; mouth terminal, jaws equal; caudal forked; V. 6; palatine 
teeth absent, vomerine occasionally present; D. I, 4-5; humeral process present; 
occipital process firmly united to dorsal plate; head naked and usually granular. 
62. CENTROMOCHLUS HECKELIL (Filippi) 
Auchenipterus heckelii Filippi, 1853, Guer. Rev. et Mag. Zool., 166. 
Centromochlus heckelit Giinther, 1864, Cat. Fish. Brit. Mus., V, 197; 
Cope, 1878, Proc. Amer. Phil. Soe., XVII, 677, Peruvian Amazon; 
Eigenmann and EKigenmann, 1888, Proce. Cal. Aead. Sei., (2), 1, 156; 
Eigenmann and EKigenmann, 1890, Occ. Papers Cal. Acad. Sei., I, 267; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 395. 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 231, Contamana, one, 71 mm. 
Amazon system 
15660, 5, 77-120 mm., Rio Morona, Allen, October, 1920. 
15781, 1, 94 mm., Rio Huallaga, Yurimaguas, Allen, October, 1920. 
15782, 2, 70 and 90 mm., mouth Rio Pacaya, Allen, August, 1920. 
15783, 2, 97 and 95 mm., Iquitos, Allen, September, 1920. 
15889, 4, 67-103 mm., Rio Ucayali, near Orellana, Allen, August, 1920. 
