﻿ICHTHYOLOGICAL RECONNAISSANCE OP COLOMBIA 



7 



Creagrutus alfinis Steindachner 



Crecifjnitiis affiiih SteincL. Fiselit'. Canca and Fliisse bei Gnayaquil, 

 18S0, 27 (Caiica, near Caceres). 



Creagrutus notropoides Meek, Field Mnseiuii Publication 158, 68, Feb. 

 1012. (Cliagres.) 



Habitat: Cauca, Atrato, San Juan and Cbagres. 



►Steindachner. whose specimens came from near Caceres on the Cauca, 

 gives the following facts concerning his C. afpnis: 

 The largest specimen is 45 mm. long. 

 D. 10; A. 14; Y. 8; L. lat. 86-37. 



Head, 31 ; depth 3.5-f ; eye 2.4-2.5 ; interorbital 3.6 ; snout 4 in the 

 head. Pectoral as long as head without snout, reaching ventrals. 



This description excludes the specimens taken in the upper Cauca, 

 hreviimmis having but 10-12 anal rays and cauca nus having a smaller eye 

 and thQ scales 39 to 41. Of the remaining material collected in Colombia, 

 some of the specimens ollected in Soplaviento, Bernal Creek, the Atrato 

 and the San Juan agree in the number of anal rays and scales. Of 

 these, those from the San Juan-Atrato basin agree more closely in the 

 size of the eye and in the depth and it is to these that the name afflnis 

 should probably be ap])lied. I collected no material in the lower Cauca, 

 from vrhich the tj^Des of the species came. 



CM. 4890, I.U.M. 12731. Eight, largest 79 mm. Puerto Negria. 



CM. 4891, I.U.M. 12732. Four, largest SO mm. Half way between 

 Puerto Negria and Istmina. 



CM. 4892 a-j, I.U.M. 12733 a-j. Over 100, largest 85 mm. Istmina. 



CM. 4S93. l.VM. 12734. Over 100, largest 51 mm. Boca de Raspa- 

 dura. 



CM. 4894 a-j, I.U.M. 127P5 a-j. Forty-three, largest 65 mm. Quibdo. 



The specimens enumerated above are certainly very closely related to 

 if not identical with the C. notropoides of which Dr. Meek kindly lent 

 me two specimens. The principal part of the following description is 

 based on Istmina specimens where the species reaches its maximum size. 



Head 4; depth 3.1-3.6; D. 10; A. 13-15, most often 14; scales 4-33 

 to 36, most often 34 or 35 ; eye a little longer than snout, 3 in head, 

 about equal to the interorbital. a little larger in specimens from other 

 places. 



Body, and especially caudal peduncle, compressed ; heaviest below 

 origin of dorsal ; profile nearly straight over the head and nape, slightly 

 convex toward dorsal; snout bluntish; preventral area broad; predorsal 

 area with eight to ten scales ; depth of caudal peduncle about half the 

 length of the head, a little over half its own length. Frontal fontanel 

 much smaller than the parietal, the head convex. Second suborbital a 

 little less than the diameter of the eye; naked area behind the second 

 'suborbital one-fourth to one-half as wide as the suborbital ; premaxillary- 

 maxillary border a simple curve, about as long as the eye ; the horizontal 

 extent of tlie in-emaxillary about as long as the maxillary. First two teeth 

 of the premaxillary just in front of the lower lip. The position of the first 

 tooth in the types of notropoides is considerably different from that in th:- 



