. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. eigenmann: the cheirodontin^. 73 caudal and number seventeen to twenty-seven, all or only half of which maj' pro- trude in the male. The maxillary has but one tooth. Head ; depth ; D. 11, very rarely 12; A. 17-24; scales ^, ¥, TT, 7-,^, in those examined; seven to twelve scales with pores; eye , about equal to interorbital; depth of caudal peduncle in its length. Compressed, dorsal and ventral profiles equally arched; preventral area flattened, with a median series of abou
. The Cheirodontinae : a subfamily of minute characid fishes of South America. Characidae; Fishes. eigenmann: the cheirodontin^. 73 caudal and number seventeen to twenty-seven, all or only half of which maj' pro- trude in the male. The maxillary has but one tooth. Head ; depth ; D. 11, very rarely 12; A. 17-24; scales ^, ¥, TT, 7-,^, in those examined; seven to twelve scales with pores; eye , about equal to interorbital; depth of caudal peduncle in its length. Compressed, dorsal and ventral profiles equally arched; preventral area flattened, with a median series of about thirteen scales; predorsal area rounded, with thirteen scales; frontal fontanel from half to one-third as long as the parietal; a broad naked area behind the third suborbital, sometimes extending forward a little at the angle of the preopercle, postorbital not half as wide as the naked area behind it; mouth small, maxillary little, if any, longer than half the eye, shortest in specimens from Cacequy and Maldonado, in which its free margin is more convex. Premaxillary with four or five teeth (six in a few premaxillaries); maxillary uniformly with a single tooth (except in one maxillary, which in addition has a minute tooth); five, six, or seven graduate teeth in mandible, the teeth five- to seven-pointed, the base narrower than the tip. Gill-rakers 7 -|- 12, to 9 -|- 13, short, the longest not quite a third as long as the eye. Origin of the dorsal equidistant from tip of snout and base of mid-caudal Fig. 25. Cheirodon monodon Cope, a and b, premaxillary and maxillary with their teeth. Adipose fin well-developed. Origin of anal about equidistant from snout with last dorsal ray. Pectorals reaching ventrals, the ventrals not quite to the anal, the fourth or fifth to the eighth to fourteenth anal rays of the male with hooks; the ventrals in adult males also with hooks; seventeen or more interhaemals on caudal peduncle, those of male contiguous, with broad lateral processes
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectfishes, bookyear1915
