THE CATFISHES OF VENEZUELA — SCHULTZ 



245 



last anal ray; gill openings small, inferior, a little in front of base of 

 pectorals; eyes small, their rear margin abont equidistant between 

 the tip of snout and end of siipraoccipital knob; caudal iin truncate, 

 the first branched ray of lower lobe longest. 



Genotype. —Duponyichthys sapito, new species. 



Named Dupovyichthys in honor of my friend Dr. Walter Dupouy, 

 director of the Museo de Ciencias Naturales, Caracas, Venezuela. 



DUPOUYICHTHYS SAPITO, new species 



Sapito 

 Plate 4, D; Figure 4, b 



Holotype. — U.S.N.M. No. 121072, a specimen 23 mm. in standard 

 length, collected by Leonard P. Schultz, March 17, 1942, in the Rio 

 Motatan, at the bridge 22 km. north of Motatan. 



Paratypes (all collected by L. P. Schultz).— U.S.N.M. No. 121073, 

 3 specimens, 21 to 22.7 mm. in standard length, taken along with the 

 holotype and bearing the same data; U.S.N.M. No. 121074, 3 speci- 

 mens, 18 to 18.5 mm., from the Rio San Juan about 12 km. south of 

 Rosario, Maracaibo Basin, February 26, 1942; U.S.N.M. No. 121122, 

 1 specimen, 18.5 mm., from the Rio Negro, below mouth of Rio 

 Yasa, Maracaibo Basin, March 2, 1942. 



Figure 4. — Sketches of the underside of the head of two Bunocephalidae: a, Hoplomyzon 

 alrizona atrizona Myers and H. a. peiroleus, new subspecies; h, Dupouyichthys sapito, new 

 genus and species. 



Description. — Based on the holotype and 7 paratypes listed above. 

 Detailed measurements were made on the holotype and one paratype 

 and recorded in hundredths of the standard length, respectively. 

 Standard length (in mm.) 23 and 20.7; total length 27.4 and 26 mm. 



Length of head from tip of snout to posterior tip of supraoccipital 

 30.9 and 31.4; width of head at coracoids 30.0 and 33.3; greatest depth 

 of body 17.4 and 18.4; postorbital length of head 16.1 and 17.4; length 

 of snout 13.5 and 15.0; diameter of eye 2.61 and 2.90; width of fleshy 



