THE CATFISHES OF VENEZUEI^A — ^SlCHIILTZ 303 



Table 18. — Counts made on species o/-Ancistrus 



Species 



triradiatus tmadiattLS. 



tnradiatus martini 



brevifUis brevifilis 



brevifdis bodenhameri. 



chagresi 



spinosus..- 



rothschitdi 



Number of fln 

 rays 



Dorsal 



1,6 1,7 



Anal 



1,3 1,4 



Number of plates 



From dorsal to 

 adipose fin 



From anal 

 to caudal fin 



10 11 12 



In lower lateral 

 series 



23 24 21 2f> 



Paratypes. — U.S.N.M. No. 121065, 3 specimens, 14 to 51.6 mm., 

 taken along with the holotype and bearmg the same data; U.S.N.M. 

 No. 120094, a female, 80 mm. in standard length, collected by 

 Niceforo Maria, near Cucata, Colombia, Catatmnbo system. 



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

 Measurements, expressed in hundredths of the standard length, are 

 recorded for the holotype, followed by those for two paratypes in 

 parentheses. Standard length (in mm.) 81.5 (51.6; 80); total length 

 104.5 (71.1; --) mm.; sex cf (9; 9). 



Length of head from tip of snout to rear edge of temporal plate 

 38.9 (36.0; 34.6); length of head to posterior tip of supraoccipital 

 38.6 (36.5; 33.8); width of head at base of pectorals 31.5 (33.9; 32.0); 

 postorbital length of head 12.5 (10.1; 11.2); greatest depth of body 

 12.5 (10.1; 11.2); length of snout 24.5 (22.5; 20.2); distance from eye 

 to middorsal tip of bony area of snout 13.1 (20.0; 18.6); diameter of 

 eye 4.29 (5.23; 4.50); width of preorbital bony space 2.45 (9.11; 8.88) ; 

 width of fleshy interorbital space 17.1 (16.9; 15.9); length of ramus 

 of lower jaw 6.26 (6.00; 5.75); length of longest spine on interopercle 

 10.5 (6.59; 6.62); distance from eye to bony edge of nostril 3.19 

 (3.49; 4.87); greatest width of lower lip 6.13 (5.92; 5.25); length of 

 caudal peduncle 26.5 (27.7; 24.4); least depth of caudal peduncle 

 10.8 (11.6, 11.9); length of depressed dorsal fin 39.9 (40.1; 40.3); 

 length of depressed anal fin 11.2 (10.3; 10.8); length of base of dorsal 

 fin 22.1 (24.2; 24.1); length of dorsal spme 27.0 (29.1; 27.2); length 

 of last ray of dorsal fin 20.1 (19.5; 18.2); length of adipose spine 7.36 

 (9.11; 7.87); length of pectoral spuie 33.7 (33.1; 33.8); length of anal 

 spine 8.94 (10.1; 8.38); length of pelvic spme 26.4 (29.1; 26.9); length 

 of upper ray of caudal fin 27.8 (30.2; — ); length of lower ray of 

 caudal fin 29.9 (37.8; — ); distance from snout to origm of dorsal fin 

 49.1 (47.1; 47.0); distance from snout to origin of adipose fin 80.5 



