284 



PROCE&mivrGS OF THE NATIONAL MUSSEUM 



vou 04 



strongly bilobed ; intcrorbital space a little narrower than the distance 

 from the eye to the rim of the posterior nasal opening; maxillary 

 barbel short, scarcely reaching as far back as opposite the rear margin 

 of the lower lip; all the lips finely papillate; anus five-elevenths to 

 five-twelfths closer to the insertion of the pelvics than to the midbasc 

 of the caudal peduncle; adipose fin elongate, with a spine partly em- 

 bedded but the tip is connected by a membrane to the caudal peduncle, 

 which sometimes appears to be a continuation of the adipose fin; 

 first ray of dorsal not extending beyond the branched rays, this fin 

 short, contained 2 times in distance from insertion of pelvics to origm 

 of anal fin; pectorals short, reacliing about one-fourth the way out 

 the short pelvics, the latter extending three-fourths the way to the 

 anus, tips of first rays of pelvics, pectorals, and caudal very slightly 

 elongate; snout 1% in the head; eye small, 2% to 3 times in the inter- 

 orbital space. 



Color. — ^Variable, usually plain grayish with a pale area at adipose 

 spine, or the body may be mottled to brown or black spotted ; caudal 

 fin barred; sometimes on small specimens the pale area at adipose 

 spine extends as a broken pale bar across the caudal peduncle, and a 

 similar pale bar across middle of caudal fin, belly pale. 



Table 12. — Measurements, in hundredths of the standard length, for species of 

 Astroblepus /rom the Maracaibo Basin 



Character 



Astroblepus phelpsi 



Standard length (in mm.) 



Length of head to gill opening, 



Width of head at base of pectorals 



Length of maxillary barbel 



Poptorbital length of head 



Greatest depth 



Length of snout 



Diameter of eye - 



Width of interorbital - 



Distance from eye to rear nostril 



Width of ramus of upper jaw 



Width of gape of mouth 



Distance from anus to anal origin 



Tip of snout to anus 



Tip of snout to dorsal origin 



Tip of snout to anal origin 



Tip of snout to pectoral insertion 



Tip of snout to pelvic insertion 



Length of first dorsal ray 



Length of first anal ray_ 



Length of first pelvic ray 



Length of first pectoral ray 



Length of longest upper caudal ray _ . . 

 Length of shortest middle caudal ray- 

 Length of caudal peduncle 



Least depth of caudal peduncle 



Paratype Holotype Paratype 



53.6 

 27.4 

 25.9 

 8.58 

 7.28 

 20.5 

 18.6 

 2.05 

 6.90 

 7.28 

 7.10 

 13.2 

 11.6 

 67.4 

 45.0 

 78.4 

 28.2 

 43.8 

 18.1 

 13.6 

 21.5 

 24.4 

 25.9 

 18.8 

 17.7 

 14.9 



AilrohUpus chotae 



35.6 

 28.1 

 28.4 

 8.70 

 7.02 

 19.9 

 19.7 

 3.09 

 7.30 

 8.14 

 7.30 

 13.2 

 10.1 

 69.1 

 45.2 

 77.2 

 30.9 

 43.0 

 21.3 

 15.7 

 22.8 

 22.5 

 28.9 

 21.9 

 16.9 

 13.2 



93.5 

 25.6 

 28.4 

 16.0 

 7.49 

 23.0 

 17.6 

 2.24 

 6.95 

 6.95 

 .6.20 

 12.9 

 14.6 

 64.6 

 47.0 

 79.4 

 30.2 

 39.1 

 20.1 

 12.4 

 21.9 

 31.0 

 26.1 

 19.8 

 16.0 



64.7 

 26.0 

 28.6 

 17.9 

 7.73 

 22.4 

 17.3 

 2.63 

 8.04 

 7.11 

 7.42 

 12.4 

 13.4 

 68.0 

 42.6 

 78.6 

 28.6 

 44.2 

 22.7 

 13.8 

 23.5 

 32.8 

 31.1 

 18.9 

 16.1 



47.6 

 26.0 

 28.8 

 16.2 

 6.93 

 21.8 

 17.0 

 3.36 

 7.98 

 6.51 

 6.51 

 11.3 

 12.8 

 65.1 

 43.9 

 78.0 

 27.1 

 41.0 

 21.0 

 17.2 

 21.4 

 30.7 

 33.2 

 22.1 

 17.0 



