332 



PROCEEDINGS OF THE NATIONAL MUSEUM 



VOL. 94 



specimens, 21 to 138 mm., taken March 17, 1942, in the Rio Motatan 

 at the bridge 22 km. north of Motatan; U.S.N.M. No. 121097, 43 

 specimens, 53 to 260 mm., collected February 24, 1942, in the Rio 

 Socuy 3 km. above its mouth; U.S.N.M. No. 121100, 3 specimens, 62 

 to 139 mm., taken March 2, 1942, in the Rio Negro below mouth of 

 Rio Yasa; U.S.N.M. No. 121101, 13 specimens, 22 to 139 mm., taken 

 March 6, 1942, in the Rio Palmar at the bridge 70 Ion. southwest of 

 Maracaibo; U.S.N.M. No. 121094, 15 specimens, 57 to 100 mm., 

 collected March 24, 1942, m the Rio Jimelles 12 km. east of Motatdn, 

 tributary of the Rio Motatdn; U.S.N.M. No. 121095, 41 specimens, 19 

 to 81.5 mm., collected March 24, 1942, in the Rio Motatdn, 8 km. below 

 Motatdn; U.S.N.M. No. 121099, 4 paratypes, 67 to 105 mm., taken 

 February 26, 1942, in the Rio Apon, about 35 l^m. south of Rosario, 

 Estado de Zulia; U.S.N.M. No. 121093, 3 specimens, 73 to 122 mm., 

 taken March 11, 1942, in a cafio half a mile west of Sinamaica. 



The above-listed specimens occurred mostly over sandy to gravelly 

 bottoms, as well as over firm mud in a moderate current and in quiet 

 water. 



Table 26. — Measurements {expressed in hundredths of the standard length) of two 

 subspecief of Loricaria gymnogaster 



Characters 



lagoichthys 



gymno- 

 gaster 



Holotype 



Paratype 



Paratvoe U.S.N.M. 

 1: aratype -^^ ^yjis 



Standard length (in mm.).. 



Length of head to tip of supraoccipital 



Length of head to end of opercle 



Length of head to end of temporal plate 



Width of head at base of pectorals 



Greatest depth of body. 



Width of body at plate through anal origin 



Length of snout - — 



Diameter of eye (not including notch) 



Bony interorbital space (least width). 



Postorbital length of head 



Least depth of caudal peduncle. 



Width of caudal peduncle in front of caudal fin 



Length of caudal peduncle - -- 



Length of spine of dorsal fin 



Length of spine of anal fin 



Length of spine of pectoral fin 



Length of spine of pelvic fin — 



Length of last ray of pelvic fin - 



Length of last ray of pectoral fin 



Length of hist ray of anal fin 



Length of last ray of dorsal fin 



Tip of snout to origin of dorsal fin... 



Tip of snout to origin of anal fin 



Tip of snout to origin of pectoral fin 



Tip of snout to origin of pelvic fin 



Distance from center of anus to anal origin 



305 

 23. 

 20. 

 24. 

 18. 

 12. 

 15. 

 14. 



3. 



5. 



8. 



1. 



4. 

 45. 

 22. 

 19. 

 22. 

 23. 

 10. 



7. 

 11. 



8. 

 35. 

 51. 

 19. 

 34. 

 10. 



139 

 21.9 

 18.1 

 22. 7 

 17.7 

 11.9 

 14.9 

 12.4 

 4.68 

 5.11 

 7.05 

 1.58 

 3.31 

 49.4 

 22.0 

 18.7 

 21.2 

 19.9 

 8.63 

 6.98 

 11.2 

 8.64 

 32 8 

 45.3 

 17.6 

 31.4 

 9.72 



77.6 

 24.0 

 18.2 

 24.1 

 18.6 

 11.7 

 13.0 

 12.4 

 4.25 

 .5.28 

 7.99 

 1.42 

 3.22 

 47.7 

 22.9 

 19.6 

 21.9 

 21.9 

 8.64 

 7.73 

 10.8 

 9.67 

 33.3 

 46.5 

 19.1 

 31.2 

 10.3 



80 

 22.5 

 17.6 

 22.4 

 17.7 

 8.87 

 11.6 

 11.9 

 3.25 

 5.25 

 7.13 

 1.50 

 2.62 

 52.7 

 19.0 

 18.1 

 20.6 

 22.2 

 10.0 

 8.88 

 10.0 

 8.88 

 30.1 

 43.2 

 16.9 

 30.1 

 8.25 



