ANNOTATED. LIST OF THE SPECIES 183 
Rhinelepis Spix, 1829, Sel. Gen. et Spee. Pisce. Bras., 2; 
Steindachner, 1878, Sitzb. KKK. Akad. Wiss. Wien, LX XVI, 228. 
Pogonopoma Regan, 1904, Trans. Zool. Soc. London, XVII, 205. 
Canthopomus EKigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 407, nomen nudum. 
Type: Rhinelepis agassizii Steindachner 
Throughout Amazonia 
Regan used the subgeneric name Pogonopoma for Plecostomus wertheimeri 
Steindachner, Plecostomus pellegrini Regan, and Rhinelepis genibarbis Cuvier and 
Valenciennes, of which he considers Rhinelepis agassizvi a synonym. 
Plecostomus wertheimert seems from our material generically distinct from 
Plecostomus pellegrint and Rhinelepis genibarbis, and if we restrict the name Po- 
gonopoma to wertheimeri, the term Canthopomus may be applied to agassizii. 
REGAN EIGENMANN 
Plecostomus wertheimeri Steind. Subg. Pogonopoma Pogonopoma 
Plecostomus pellegrini Regan . Plecostomus 
Rhinelepis genibarbis C. & V. = * Rhinelepis 
Rhinelepis agassizii Steind. Synonym Canthopomus 
No trace of an adipose fin; scutes 24 or 25; occipital bordered by three plates; 
lower surface with minute granular plates and a series of large plates on the sides 
between pectorals and ventrals; scutes of sides carinate; opercle hirsute. 
164. CANTHOPOMUS AGASSIZII (Steindachner) 
Plate VII, figs. 1-2 
Rhinelepis agassizi Steindachner, 1878, Sitzb. Kk. Akad. Wiss. Wien, LX XVI, 228; 
Steindachner, 1882, Denksch, KK. Akad. Wiss. Wien, XLVI, 7; 
EKigenmann and Eigenmann, 1889, Proc. Cal. Acad. Sei., (2), II, 42; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 416. 
Acanthicus genibarbis Eigenmann and Higenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 441. 
Plecostomus genibarbis (in part) Regan, 1904, Trans. Zool. Soc. London, XVII, 219. 
Canthopomus genibarbis (in part), Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 
407. 
Lake Manacapurii to Rio Huallaga 
15970, 1, 154 mm. to end of plates at base of caudal, Iquitos, Morris, 1922. 
Genus 74: HYPOSTOMUS (Lacépéde) 
Plecostomus Gronow, after Artedi, 1754, Mus. Ichth., I, 24; 
Gronow, 1763, Zoophyl., 127, sp., not binomial; 
Bleeker, 1863, Nederl. Tijdsch. Dierk., I, 77, brasiliensis; 
EKigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 396; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 403; 
Regan, 1904, Trans. Zool. Soc. London, XVII, 202; 
Authors generally. 
