128 FISHES OF WESTERN SOUTH AMERICA 
Guiana to Guaporé and Peru 
15887, 1, 65 mm., Rio Itaya, Iquitos, Allen, September, 1920. 
82. AMBLYDORAS MONITOR (Cope) 
Zathorax monitor Cope, 1871, Proc. Acad. Nat. Sci. Phila., XXIII, 272, pl. iv, fig. 1, Rio Ambyiacu. 
Doras monitor Eigenmann and Higenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 245. 
Doras (Astrodoras) monitor Bigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 393. 
Amblydoras monitor Eigenmann, 1925, Trans. Amer. Phil. Soc., XXIT, 326, fig. 20. 
Iknown only from the type specimen at the Philadelphia Academy of Sciences, 
Rio Ambyiacu. 
Genus 39: ANADORAS Eigenmann 
Doras Cope, 1871, Proc. Acad. Nat. Sci. Phila., 270. 
Anadoras Kigenmann, 1925, Trans. Amer. Phil. Soc., XXII, 327. 
Type: Doras grypus Cope 
Amazon basin to Pilcomayo 
Serrations lacking on the nasal; a space between granulations of right and left 
coracoids and clavicles covered only by skin; coracoid process shorter than humeral; 
adipose fin not continued as a keel; dorsal spine grooved and without serrations; 
caudal truncate; scutes numerous and covering less than one fourth of the sides; 
air bladder heart-shaped with a median groove and without marginal diverticula. 
83. ANADORAS GRYPUS (Cope) 
Doras grypus Cope, 1871, Proc. Acad. Nat. Sci. Phila., 270, pl. xv, figs. 1 and la, Rio Ambyiacu; 
Eigenmann and Higenmann, 1888, Proc. Cal. Acad. Sci., (2), I, 163; 
Eigenmann and Bigenmann, 1890, Occ. Papers Cal. Acad. Sei., I, 239. 
Doras weddellii Figenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, ITT, 393. 
Anadoras grypus Eigenmann, 1925, Trans. Amer. Phil. Soc., XXII, 328, pl. iv, fig. 7; pl. xv, figs. 1-3. 
Maranon and Solimoes drainage 
15849, , 50-139 mm., Lago Cashiboya, Allen, August, 1920. 
15961, 3, 80-150 mm., Iquitos, Morris, 1922. 
84. ANADORAS NAUTICUS (Cope) 
Zathorax nauticus Cope, 1874, Proc. Acad. Nat. Sci. Phila., XXVI, 133, Nauta; 
Cope, 1878, Proc. Amer. Phil. Soc., XVII, 678. 
Doras nauticus Eigenmann and Higenmann, 1890, Occ. Papers Cal. Acad. Sei., I, 246. 
Doras (Astrodoras) nauticus Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 393. 
Anadoras nauticus Eigenmann, 1925, Trans. Amer. Phil. Soc., XXIT, 329. 
Nauta, former head of steamboat navigation of the Amazon, has furnished the 
only specimen, 82 mm. in length, at the Philadelphia Museum of Natural Sciences. 
