EIGENMANN: the CHEIRODONTINiE. 85 



and the type of a distinct genus. But the statement was probably made without 

 microscopic preparations. Furtliermore the specimens had been in alcoliol for 

 fifty-eight years when the description was prepared and it is possible that they 

 were faded and the caudal spot small in consequence. Except for these two char- 

 acters the description of pequira applies verj^ well to specimens of trementince and 

 indeed in two of the specimens enumerated below the caudal spot is quite small. 

 There is no other species known from the upper Paraguay related to these, which 

 has an oblique bar on the upper part of the dorsal. 



Specimens sent me from the British Museum as pequira are Odontostilbe 

 microcephala. 



7317o, C. M.; 9987, 1. U. M., nine, type and paratypes of trementince. Arroyo 

 Trementina. Anisits. 



9986 and 9987, I. U. M. Brook near Arroyo Trementina. 



6857a-l, C. M., twelve, largest 43 mm. Villa Hays, Paraguay. April 13, 

 1909. Haseman. 



10187, I. U. M., one, Puerto Max. Anisits. 



6858a-e, C. M., five,^^ largest 31 mm. Asuncion, Paraguay. March 28, 1909. 

 Haseman. 



6859a, C. M., one, 35 mm. Caceres, Paraguay. May 27, 1909. Haseman. 



6860a-b, C. M., two, largest 43 mm. Corumba, Paraguay. April 27, 1909. 

 Haseman. 



6861a-h, C. M., eight, largest 45 mm. Sapucay, Paraguay. April 2, 1909. 

 Haseman. 



6862a-e, C. M., five, largest 56 mm. Cacequy, Rio Ibicuhy. Feb. 1, 1909. 

 Haseman. 



6877a-c, C. M., three, largest 55 mm. Santa Maria, Rio Maccacahy Mirim. 

 Jan. 29, 1909. Haseman. 



Head 4.5; depth 3-3.5; D. 11; A. ^, ¥, ¥, ^^ ¥; scales 6-¥,¥,¥, ¥, ¥ 

 —4; eye 2.75-3 in the head, equal to, or a little greater than, interorbital; depth of 

 caudal peduncle about 3 in the depth, 1.5 in its own length. 



Compressed, elongate; the dorsal and ventral profiles equally arched; the pre- 

 ventral area flat, with a nearly regular median series of thirteen scales; predorsal 

 area rounded or bluntly keeled, with about ten scales; occipital process one-sixth 

 in the distance from its base to the dorsal, bordered by two or three scales; frontal 

 fontanel a httle longer than wide, triangular, its length a little more than two in 

 the parietal fontanel; mouth small, the maxillary scarcely reaching to below the 



^^ Caudal spot minute in two. 



