274 



THE AMERICAN CHARACIDAE. 



C. Maxillary with one tooth; five teeth in the inner row of the premaxillary; depth 2.75; A. 21 



or 22; lateral line 41 65. gymnogenijs Eigermiann. 



CC. Maxillary with five or six teeth; four teeth in the inner row of the premaxillary; middle point 

 of the third mandibulary tooth recurved, thorn-like; depth 2.6-2.75; A. 24. 



66. aurocavdatus Eigenmann. 

 CCC. MaxiUary with three or four teeth; five teeth in the inner row of the premaxillary; depth 3.6; 



A. 22; isthmus abruptly constricted behind 67. paranahybae Eigenmann. 



CC. Second suborbital covering entire cheek; 5 teeth in the inner series of the premaxillary. 

 Dorsal equidistant from snout and caudal. (Small species approaching Bryconamericus, 

 reaching a maximum length of 70 mm.). 

 D. Caudal band continued to the end of the caudal. 

 E. Maxillary with usually 5 teeth; depth 3.3; A. 24-25; lateral line 32-34. 



68. multidens Eigenmann. 

 EE. Maxillary with 3 teeth ; depth 3.5-4; five large dentary teeth; A. 22-24; lateral line 



36 or 37; caudal spot large 69. gracilior Eigenmann. 



DD. Caudal spot if present not continued to the end of the middle rays. 

 F. No humeral spot. 



G. A. 20; lateral line 32 70. paticidens (Uhey). 



GG. A. 22-24; lateral line 38 71. hasemani Eigenmann. 



FF. A well-developed humeral band; teeth in the sides of the lower jaw minute. 



H. Depth 3.33. A. 20-22; frequently a minute caudal spot; adipose margined 



with black 72. essequibensis Eigenmann. 



HH. Depth 2.6-3 73. guianensis Eigemnann. 



HHH. A. 27-31; no caudal spot 74. guaporensis Eigenmann. 



30. AsTYANAX MiCROLEPis Eigenmann. 



Plate 48, fig. 4. 

 Astyanax microlepis Eigenmann, Indiana univ. studies, 1913, no. 18, p. 24. 



Habitat. — Upper Cauca Basin, Ecuador. 



Catalogue 

 number 



5001 C. TjTe 



5002 C, 12769 I. Paratopes 



5003 C, 12770 I. Paratypes 



5004 C, 12771 I. Paratypes 



5005 C, 12772 I. Paratypes 



5006 C, 12773 I. Paratj-pes 



Size 

 in mm. 



Specimens examined. 



Number of 

 specimens 



1 88 



48-87 

 1121 

 1081 

 991 



4 



00 



50 

 20 



Locality 

 Piedra Moler 

 Piedra Moler 

 Cartago 

 Paila 

 Call 



Cauca, near Cali 



Collector 

 Eigenmann 

 Eigenmann 

 Eigenmann 

 Eigenmann 

 Eigenmann 

 Eigenmann 



Very similar to Poecilurichthys caucanus Steindachner, and Astyanax fascia- 

 tus Cuvier from which it differs in the number of scales. 



Head 3.66; depth 2.8-3.2; D. 11; A. 22-25; scales 8 to 10-50 to 55-8 or 9; 

 eye 3.33 in the head, interorbital 3. 



Profile over eye depressed. Preventral area narrow, flattened, without 



' Largest specimen. 



