﻿ICHTHYOLOGICAL RECONNAISSANCE OF COLOMBIA 11 



ce. Five scales between the origin of the dorsal and the lateral line. 



d. A. usually 31 .or 32. sometimes 29, 30. 33 or 34 ; base of anal 3 or a 



little more than 3 in the length. 



8. chocoensis Eigenmann. 



X. Head 4.3-4.5 : depth 3.4-3.75 ; scales 5-39 to 41-5. 



chocoensis from San Jiian. 



XX. Head 4.33-4.75: depth 3.75-4: scales 5-39 to 41-4. 



chocoensis from Atrato. 



dd. A. 35-45; head 4.75-5.33; depth :3-4: D. 10: scales 5-40 to 43-4; eye 

 2.33-3 in the head, equal or a little greater than interorbital ; base 

 of anal 2.4-2.(3 in the length ; origin of anal under anterior half of 

 dorsal. 



4 magdaleiie.^sis Kigenrnann 



y. A. 34-43 (usually 35 to 37) ; origin of anal nearer base of middle 

 caudal rays than to snout ; some chromatophores along iuter- 

 hgemals; a small spot at base of middle caudal rays. 



magdalenensis from Rio N'.ejo, 



yy. A, 40-45 ; origin of anal equidistant from snout and caudal ; a row 

 of chromatophores along the base of the anal rays ; a few 

 chromatophores half way between lateral line and anterior part 

 of anal : no caudal spot. 



magdalenensis fro n Magdalenn and Cauca. 



aa. Caudal of male without glandular scales, hooks of anal, in male 

 along all of the anterior rays. Lower caudal fulcra not prominent. 



e. Six to nine scales between the lateral line and dorsal ; depth 2,5-3.5 



Pacific slope of Ecuador, on both slopes of Colombia and Central 

 America.) subgenus. 



f. Maxillary with 0-3 teeth, confined to the upper anterior margin. 



g. Origin of dorsal equidistant from tip of snout and base of middle 



caudal rays or nearer the latter. (Peru to Panama.) 



h. Middle caudal rays pale, no caudal spot ; scales 6 or 7-36 to 40-7 ; 



A. 26-30. Head 4.4: depth 3.4: pectorals reaching ventrals, ven- 

 trals to anal : origin of dorsal equidistant from base of middle 

 caudal rays and from snout. 



5. simus (Boulengtr ) 



hh. A conspicuous black spot on caudal peduncle, not continued to the 

 end of the rays. 



i. Scales S-40 to 45-6 or 7 ; head 3.6 ; maxillary equal to length of 

 eye ; eye larger than interorbital. 



6. emperador Eigenmann 



