. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. 32 MEMOIRS OF THE CARNEGIE MUSEUM. 10025, I. U. M., one, 26 mm. to base of caudal. Arroyo Chagalalina, Para- guay basin. J. D. Anisits. Type of mthbuni. 10030, I. U. M., one, 25 mm. to base of caudal. Arroyo Trementina. J. D. Anisits. Type of stramineus. A close comparison of rathbuni and stramineus in the light of the study of the group of the Cheirodontince makes it quite probable that stramineus is the female of rathbuni. No additional material was collected by Haseman. Head 4; depth 3; D. 11;
. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. 32 MEMOIRS OF THE CARNEGIE MUSEUM. 10025, I. U. M., one, 26 mm. to base of caudal. Arroyo Chagalalina, Para- guay basin. J. D. Anisits. Type of mthbuni. 10030, I. U. M., one, 25 mm. to base of caudal. Arroyo Trementina. J. D. Anisits. Type of stramineus. A close comparison of rathbuni and stramineus in the light of the study of the group of the Cheirodontince makes it quite probable that stramineus is the female of rathbuni. No additional material was collected by Haseman. Head 4; depth 3; D. 11; A. 19 or 20; scales 35, 9 between dorsal and ventrals; eye ;-3 in the head, equal to the interorbital; snout about half length of eye. Elongate, compressed; preventral area rounded, without a distinct median series of scales, of which there are eleven between ventrals and the isthmus; pre- dorsal area rounded, with about fourteen scales, of which about nine in front of the dorsal are in a median series; occipital process very short, reaching about. Fig. 9. Aphyocharax rathbuni Eigenmarm. Greatly enlarged. one-seventh to the dorsal; frontal fontanel about half as long as the parietal with its groove; second suborbital in contact with the lower limb of the preopercle along its entire margin; a naked wedge behind it; postorbital strong, its margin more convex in the male than in the female, having a naked area around its entire distal margin; lateral line tubes on the postorbital and on the third suborbital strong; mouth very small, the maxillary very short, its margin very convex, not reaching the anterior margin of the eye; premaxillary with about five teeth, maxil- lary with one to three; mandible with six to nine teeth, the first three rapidly graduate. Origin of dorsal a little nearer base of caudal than tip of snout; origin of anal under dorsal; anal with a shght lobe, the end of the fin rounded; most of the anal. Please note that these images are extracted from scann
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfishes, bookyear1915
