. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. 54 MEMOIRS OF THE CARNEGIE MUSEUM. Maxillarj' teeth six or seven; premaxillary with six to eight conical teeth and two to four with lateral cusps; mandible with ten conical teeth and four with lateral cusps; maxillary extending considerably beyond the anterior margin of the eye. Origin of dorsal midway between tip of snout and base of caudal. Pectorals. Fig. 15. Megalamphodus hetcresthes (Ulrey), a, top of head, showing frontal (/) and occipital (o) fon- tanels; b, maxillary; c, premaxillary. ext
. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. 54 MEMOIRS OF THE CARNEGIE MUSEUM. Maxillarj' teeth six or seven; premaxillary with six to eight conical teeth and two to four with lateral cusps; mandible with ten conical teeth and four with lateral cusps; maxillary extending considerably beyond the anterior margin of the eye. Origin of dorsal midway between tip of snout and base of caudal. Pectorals. Fig. 15. Megalamphodus hetcresthes (Ulrey), a, top of head, showing frontal (/) and occipital (o) fon- tanels; b, maxillary; c, premaxillary. extending beyond tips of the axillary scale; ventrals reaching anal; anal rays graduate. No humeral or caudal spots, the upper half of the first developed rays of the dorsal black. 28. Megalamphodus micropterus sp. nov. (Plate VIII, fig. 1.) 6900a, C. M., t3rpe, 30 mm. 6901a-q, C. M., paratypes, seventeen, largest about 28 mm. Lagoa do Porto, Dec. 24, 1907. Haseman. 6904a, C. M., paratype, one, 27 mm. Rio Salitre. Haseman. 6902a-i, C. M., paratypes, nine, largest 30 mm. Santa Rita, Jan. 24,1908. Haseman. 6903, C. M., paratypes, thirty-five, largest 32 mm. Pirapora, Dec. 14,1907. Haseman. 6905a-d, C. M., four in bad state. Boqueirao near mouth of Rio Preto. This species from the basin of the Rio San Francisco is similar to eques, from which it differs at least in the number of anal rays. Head ; depth ; D. 11; A. 24-26; scales 5 to 7 + 24 to 27. Eye , much larger than the interorbital. Similar to M. megalopterus in shape, the back not quite so elevated; predorsal area with nine or ten scales. Mouth large, the maxillary not quite as long as the eye, not reaching to suture between the second and third suborbitals; premaxillary with seven to nine teeth, of which one or two may be conical, the rest tricuspid; maxillary with two to six. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfishes, bookyear1915
