442 CALIFORNIA ACADEMY OP SCIENCES. 



= Chmtostomus Bleeker, Nederl. Tijdschr. Dierkunde, 

 i, 1863, 78 (loborhynchus) . 



<Chcetostomus Gunther, v, 240, 1864. 



Type: Chcetostomus loborhynchus Tschudi. 



This genus as here understood includes all naked 

 snouted Plecostomince. We have not been able to exam- 

 ine any species and give here a list with references 

 merely. 



Habitat: Eastern slopes, Amazon to Panama; western 

 slopes, Chile to Rio Mamoni. Chiefly in mountain 

 streams. 



416, Chaetostomus jellskii, 



Chcetostomus jellskii Steindachner, Ichthyol. Beitr. iv, 53, 1876 (Am- 

 able Maria; Monterico); Eigenm. & Eigenm. Proc. Cal. Acad. 

 2d Ser. ii, 46, 1889. 



417- Chaetostomus latifrons, 



Chcetostomus latifrons Giinther, Proc. Zool. Soc. London, 1869, 426 

 (Upper Amazons); Eigenm & Eigenm. 1. c. 



418- Chaetostomus macrops, 



Chcetostomus macrops Littken, Vid. Medd. 1874, 209 (Surinam); 

 Steindachner, Flussfische Siidam. ii, 125, pi. v, fig. 3, 1881; 

 Eigenm. & Eigenm. 1. c. 



419. Chsetostomus stannii. 



Chcetostomus stannii Kroyer, MS. Littken, Vid. Medd. 1874, 206 (Pu- 

 erto Cabello); Steindachner, Flussfische Siidam. ii, 120, pi. v, 

 fig. 4, 1881 (Mamoni river, near Chepo); Eigenm. & Eigenm. 

 Proc. Cal. Acad. 2d Ser. 46, 1889. 



420. Chaetostomus taczanowskii, 



Chcetostomus taczanowskii Steindachner, Flussfische Siidamerika's, iv, 

 23, plate v, fig. 2-2a (Kio de Tortara; Kio de Huambo); Eigenm. 

 & Eigenm. Proc. Cal. Acad. 2d Ser. ii, 46, 1889. 



421. Chffitostomus tectirostris. 



Chcetostomus tectirostris Cope, Proc. Acad. Nat. Sci. -Philad. 1871, 

 288, pi. 15, fig. 2 (Ambyiacu river); Eigenm. & Eigenm. 1. c. 



422. Chaetostomus variolus. 



Chcetostomus variolus Cope, (Ambyiacu river); Eigenm. & Eigenm. 

 1. c. 



