THE CATFISHES OF VENEZUEiLA — SCHULTZ 275 



Rhinodoras niger Peters, Monatsb. Akad. Wiss. Berlin, 1877, p. 471 (Calabozo, 



Venezuela). 

 Pseudodoras niger Eigenmann, Trans. Amer. Philos. Soc, vol. 22, pt. 5, p. 333, 



pi. 1, fig. 16; pi. 17, figs. 1-4; pi. 23, fig. 1; figs. 2, 6, 7, 10; 1925. 



Genus OPSODORAS Eigenmann 



Opsodoras Eigenmann, Trans. Amer. Philos. Soc, vol. 22, pt. 5, p. 348, 1925. 

 (Type, Opsodoras orthacanlhus Eigenmann.) 



OPSODORAS LEPORHINUS (Eigenmann) 



Hemidoras leporhinus Eigenmann, Rep. Princeton Univ. Exped. Patagonia, vol. 3, 

 p. 394, 1910 {nojnen nudum); Mem. Carnegie Mus., vol. 5, p. 195, pi. 19, 

 fig. 1, 1912 (British Guiana at Tumatumari, Potaro Iliver and Crab Falls, 

 Essequibo River). 



Opsodoras leporhinus Eigenmann, Trans. Amer. Philos. Soc, vol. 22, pt. 5, pp. 

 303, 354, 1925 (Orinoco and Venezuela). 



Family CALLICHTHYIDAE 



KEY TO THE GENERA OF CALLICHTHYIDAE REPORTED FROM VENEZUELA (AFTER 



GOSLINE, 1940) 



la. Snout depressed, interorbital width greater than or equal to depth of head at 

 forward margin of orbit; eye more or less superiorly situated, i. e., not 

 equally visible from above and below, its diameter contained two or more 

 times in its distance from lower end of bony opercle; foremost plates of 

 upper lateral series, or nuchal plates, fused across midline between supra- 

 occipital and dorsal. 

 2a. Abdomen between pectoral fins completely covered with flesh; suborbital 



covered with flesh Callichthys ScopoU 



25. Coracoids expanded on surface of abdomen between bases of pectorals; 



suborbital bones not covered with flesh Hoplostemum Gill 



16. Snout compressed or rounded, interorbital width considerably less than depth 

 of head at forward rim of orbit; barbels at cither end of mouth, i. e., rictal 

 barbels, not reaching much beyond gill opening; lower lips reverted to form 

 a single pair of short barbels; nuchal plates not meeting along middorsal line; 

 coracoids usually more or less expanded on abdomen between pectoral bases; 

 fontanel elongate; dorsal fin with a spine and 7 or 8, possibly 9, rays. 



Corydoras Lacepfede 

 Genus CALLICHTHYS Scopoli 



Callichthys (Gronovius) Scopoli, Introductio ad historiam naturalem, p. 451, 

 1777. (Type, Callichthys cirris quattuor Gronovius= Callichthys callichthya 

 Linnaeus). (Ref. copied.) 



CALUCHTHYS CALUCHTHYS (Linnaeus) 

 CtTRITO 



Silurus callichthys Linnaeus, Systema naturae, ed. 10, p. 307, 1758 (America). 



Callichthys callichthys Pellegrin, Bull. Mus. Hist. Nat. Paris, vol. 5, p. 158, 1899 

 (Apure River, Venezuela). — Fowler, Proc. Acad. Nat. Sci. Philadelphia, 

 vol. 83, p. 408, 1931 (Pitch Lake at Guanoco, Venezuela). 



Genus HOPLOSTERNUM Gill 



Hoplostemum Gill, Ann. Lye. Nat. Hist. New York, vol. 6, p. 395, 1858. (Type, 

 Callichthys laevigatus Valenciennes = H. litiorale Hancock.) 



