102 THE AMERICAN CHARACIDAE. 



lateral line number with about equal frequency, thirty-one, thirty-two, or thirty- 

 three. 



Pectorals just reaching ventrals. 



Upper caudal lobes and sometimes the distal part of the other rays dusky, 

 a very small but well-defined humeral spot of about ten chromatophores over 

 the fourth or fifth scale of the lateral line; tip of anal lobe sometimes milk- 

 white. 



24. MOENKHATJSIA LEPIDTJRA HASEMANI, Subsp. nOV. 



Plate 15, fig. 3; Plate 101, fig. 5. 

 3746 Type 45 mm. to base of caudal Santarem, Dec. 12, 1909 Haseman 



Head4 + ; depth 3.4; D .11; A .24 ; scales 6-37-3.5. Eye 2.66 in the head, 

 snout 3.33; interorbital 2.66. 



Slender, dorsal and ventral profiles gently and evenly curved, preventral 

 area flattish with a median series of thirteen scales; predorsal area rounded with 

 a median series of ten scales. Occipital process one fifth as long as the distance 

 from its base to its dorsal, bordered by three scales. Interorbital rounded, 

 maxillary a little less than one third of the length of the head, its anterior mar- 

 gin greatly arched forward, less so posteriorly. Second suborbital leaving a 

 naked border all around. Three or four teeth in the anterior row of the pre- 

 maxillary, a small tooth on the maxillary; dentary with four large teeth and 

 abruptly small ones on the sides. 



Origin of dorsal midway between tip of snout and base of middle caudal 

 rays; pectorals not reaching the ventrals whose origin is in advance of the 

 vertical from the origin of the dorsal; anal slightly falcate. 



Scales firm with up to ten prominent radiae. Anal sheath very feeble, 

 axillary scale well developed. 



A faint humeral spot on and above the third and fourth pores of the lateral 

 fine. A silvery lateral band, most prominent between the dorsals and ending 

 a few scales in advance of the lateral line. No caudal spot. 



