THE GYMNOTID EELS OF TROPICAL AMERICA. 123 



1767 C. M., 12594 I. U. M., nine, 65-390 mm. Amatuk, Eigenmann. 



1768 C. M., 12595 I. U. M., ten, 118-212 mm. Wismar, Eigenmann. 



1769 C. M., 12596 I. U. M., eight, 111-212 mm. Crab Falls, Eigenmann. 



1770 C. M., 12597 I. U. M., six, 90-100 mm. Erukin, Eigenmann. 



1771 C. M., 12598 I. U. M., three, 115-378 mm. Warraputa, Eigenmann. 



3113 C. M., one, 170 mm. Rio das Velhas, May 13, 1908, Haseman. 



3114 C. M., three, 190-200 mm. Salto das Cruzes, Rio Tiete, Sept. 22, 1908, 

 Haseman. 



3115 C. M., one, 220 mm. Campos, June 15, 1908, Haseman. 



3116 C. M., four, 300-350 mm. Penedo, March 22, 1908, Haseman. 



3117 C. M., one, 400 mm. Joazeiro, Rio San Francisco, Nov. 28, 1907, 

 Haseman. 



3118 C. M., one, 450 mm. Pirapora, Dec. 15, 1907, Haseman. 



3119 C. M., seven, 130-380 mm. Maciel, Rio Guapore, July 29, 1909, Hase- 

 man. 



3120 C. M., five, 110-175 mm. Rio Jaurii, June 2, 1909, Haseman. 



3121 C. M., four, 90-260 mm. Caceres, May 24, 1909, Haseman. 



3122 C. M., six, 130-430 mm. Santarem, Dec. 15, 1909, Haseman. 



3123 C. M., one, 155 mm. Bastos, June 26, 1909, Haseman. 

 6316 I. U. M., one, 240 mm. South America. 



5091 I. U. M., one, 280 mm. Isl. of Marajo, Brazil. 

 10300 I. U. M., two, 130-270 mm. 



1772 C. M., 12599 I. U. M., six, 128-350 mm. Mud Creek, Aruka River, 

 Shideler. 



1773 C. M., 12600 I. U. M., two, 180-195 mm. Konawaruk, Eigenmann. 



1774 C. M., one, 430 mm. Issora Rubber Station trenches, Shideler. 



1775 C. M., one, 215 mm. Waratuk, Eigenmann. 

 Ten, 250-370 mm. Georgetown, Sept. 30, 1910, Ellis. 

 Fourteen, 190-300 mm. Hubabu Creek, Oct. 1, 1910, Ellis. 



3124 C. M., three, 200-250 mm. Hubabu Creek, Oct. 1, 1910, Ellis. 



Head 6.8 to 7.25, depth 7 to 7.3 in the length to the end of the anal; anal rays 

 245-299.3 



Snout 2.75 to 3, interorbital about 3 in the head; eye 3.75 to 4 in the snout, 

 about 4 in the interorbital, and 10 to 13 in the head. 



Compressed; width of the head 2 to 2.25, depth of the head in the occipital 

 region 1.8 to 1.5 in the greatest depth; anus about twice the eye behind the vertical 

 from the eye; dorsal profile weakly convex, ventral slightly more convex than 



' Seventeen specimens taken at random have the anal rays as follows: 

 Botanic Garden, 256, 270, 270, 277, 278. 

 Georgetown Trenches, 249, 254, 263, 264, 271, 290. 

 Potaro Landing, 245, 2.50, 265, 272, 269. 

 Issora Rubber Station, 273. 



