38 



INDIANA UNIVERSITY 



prolonged in the male, reaeliing beyond origin of caudal ; no adipose fin ; 

 caudal forked, in female, split to its base in the male, the lOAver lobe 

 slightly longer than the upper in the female 3.5 in the length, much longer 

 in the male 1.66 in the length ; lower three caudal fulcra in the male 

 separated from the rest of the fin as in Gepliiirocharax ; origin of the anal 

 in front of the vertical from the front of the dorsal, its margin in the 

 female rounded to the last rays whic-h are slightly longer, similar but 

 much higher in the male, the last raj^ c^xpanded at the tip, which extends 

 to the end of the separate lower caudal fulcra ; ventral not reaching to the 

 anal in the female, to beyond its origin in the male, the next to the inner 

 ray at least as long as the longest; pectorals in the males reaching to or 

 beyond origin of the anal, a little shorter in the female. 

 iNIiddle caudal rays dusky. 



2. Stevardia albipinnis Gill. 



Stcvurdia aUnpimiis Gill, Fishes of Trinidad, 1858, p. 65. 

 Corynoponia riisei Gill, ibid. p. 66. 

 Nematopoma searlsii Gill, ibid, p. 69. 



Habitat: Island of Trinidad, British West Indies. ^ 



II. DIAPOMA Cope. 

 3. Diapoma speculiferum Cope. 



Diapovia speculiferum Cope. Am. Nat., 1894, p. 67. 

 Habitat : Rio Grande do Sul. 



III. PTEROBRYCON Eigenmann. 

 4. Pterobrycon landoni Eigenmann. 



Pterodrycon landoni Eigenmann, Indiana University Studies, 18, 1913, p. 3. 

 Habitat: Atrato basin, Colombia. 



IV. PSEUDOCORYNOPOMA Perugia. 



Kcij to the species of Psendocoryhopoma 

 a. Anal in the male with an anterior lobe with narrow membranes 

 and eight or nine (not counting the first two) broad rays with tubercles 

 and 29-34 nontubercle-bearing rays; the margin of the fin simply emar- 

 ginate or falcate; caudal divided to its base; dorsal reaching tip of 

 adipose; pectorals, anal and caudal icbes not brown tipped; a black 

 streak forward from anus; A. 37-44. 5. heterandria Eigenmann. 



a. Caudal lobes with brown near The end in both sexes; anal in the 

 male with an anterior lobe of very wide membranes and 7-10 narrow rays 

 including the rudimentary ones, followed by a second much lower lobe of 

 narrow membranes with 4-7 tubercle-bearing rays, finally 20-26 nontubercle- 

 bearing rays, the margin of the fin double concave; anterior dorsal rays 

 reaching to about middle of caudal; pectorals beyond origin of anal; 

 frequently tips of pectorals, of rays of anterior anal lobe as well as tips of 

 caudal, in male; black. A. 32-41, rarely more than 37. 



6. do rice Perugia. 



