332 PROCEEDINGS OF THE NATIONAL MUSEUM VOL. 95 
U.S.N.M. No. 121489, 154 examples, 15 to 47 mm., Rio Socuy, 3 km. above 
mouth, February 24. 
U.S.N.M. No. 121487, 229 specimens, 16 to 54 mm., Rio Palmar near Totuma, 
about 100 km. southwest of Maracaibo, February 21. 
U.S.N.M. No. 121490, 148 specimens, 20 to 49 mm., Rio Motatdn, 8 km. below 
Motatdn, March 24. 
U.S.N.M. No. 121493, 11 examples, 17 to 35.5 mm., Rio Machango, 20 km. 
above bridge, south of Lagunillas, March 21. 
This species occupies the rapidly flowing waters of the middle and 
lower parts of the rivers. 
TABLE 22.—Counts and measurements made on species of Creagrutus (all measure- 
ments expressed in hundredths of the standard length) 
Species 
hildebrandi bolivari 
Characters et NW 
Holotype | Paratype | Holotype | Paratype 
U.S.N.M. | U.S.N.M. | U.S.N.M. | U.S.N.M. 
No. 121482 | No. 121491 | No. 121497 | No. 121498 
Stan Gardplen oi hy (iraerr rr) eee eee eee ya 50. 0 39. 5 50. 5 38. 7 
Teme thot Wea sey Ne see AN SE Jen eae sara ee eet 27.2 29. 6 26. 5 27.1 
Greatestidepthiof bodys eae sas yaa eee eee 29. 0 27.3 29.7 27.1 
TENS CHO SHOU eee ee eA mie wae ate wetness 7.8 8.6 7. 72 7.75 
Diameter Oley, ens ee Nee Ta ae eae at a err eyes 9.0 11.6 8. 91 9.05 
enethiof mo wth re ere ae Ninety Ne ate ean 11.0 12.4 10.5 TT 
Widthiinterorbital sega eee ee eWay eis aa areelpoee 9.0 8&1 8. 51 9.05 
Postorbital length of head______--...-.----------------- 12.6 12.7 13.7 12.1 
Least depth of caudal peduncle____.-------------------- 12.8 11.1 12.1 11.9 
Length of caudal peduncle_--_-------------------------- 11.0 22. 5 24.0 23.8 
IEG MEAI A CORRS Ot Give ee oe 21.0 19.8 16.6 15.0 
Length of longest anal ray___.-----.-------------------- 18.8 19.0 18. 2 17.6 
Length of longest dorsal ray__-------------------------- 22.8 19.0 18. 4 20. 7 
Length of longest pectoral ray__------------------------ 20.8 20. 2 19.6 19, 4 
Length of longest pelvic ray___------------------------- 15.4 16. 5 17.4 15.5 
Length of upper caudal fin lobe___--------------------- 31.0 30.1 26. 0 27.6 
Length of lower caudal fin lobe___---:------------------ 31.0 29.6 26. 0 25.8 
Distance from snout to dorsal origin__------------------ 46. 4 45.0 47.7 47.8 
Distance from snout to adipose origin___--------------- 80.8 80. 5 78.2 80. 1 
Distance from snout to anal origin_________.._____-__-_- 63. 2 61.8 63. 5 65. 9 
Distance from snout to pectoral insertion______-__-----_- 25. 2 25. 8 24.8 25. 3 
Distance from snout to pelvic insertion__-__--_--------- 46. 4 46.6 47.7 48.8 
Distance from snout to anus____------------------------ 58. 2 51.9 56. 4 57.4 
DY OY gate gee Goji ele a al, OE Ae pS ii, 8 li, 8 ii, 8 ii, 8 
Amalitays 2s 4 ae a Ua Oy Os Cee ESS CN Lede Oc A eas iii, 11 ili, 11 ii, 9 ii, 9 
PECtOraliFA YS oe ee CDi Aras WAT Ne aaa UNA LOL eee a Bir ubeMeNY i, 12-i,12 | i, 12-1,13 | i, 18-i, 13 i, 12-i, 12 
DEAE) bra Ch oC Wash Page a el aN I a a i, 7-1, 8 i, 7-1, 7 i, 7-1, 7 i, 7-i, 7 
Branched caudal rays__.-.------------------------------ 17 17 17 17 
Number of gill rakers on first gill arch____.______.___--_]-----.--_--- SAPO aaa eS, 6+11 
Number of scales on sides__----.----------------------- 37 36 38 38 
Scales above lateral line_...---------------------------- 5 5 5 5 
Scales below lateral line.__----------------------------- 3 3 3 3 
Scales in front of dorsal fin. ._-------------------------- 9 10 9 9 
Description.—This description is based on the holotype and para- 
types listed above. Measurements were made on the former and 
