Fishes of the Western North. Atlantic 207 



7b. Gill rakers 16—18 +22—26; pectoral failing to reach pelvic 

 by a distance considerably less than eye, 14. 7-1 6.8 "/q of 

 SL, 1.4— 1.6 in head. 



8a. Eye 7.0-7.5 "/o of SL, 3.2-3.5 in head; cheek fully as 

 long as eye, with a definite posterior angle of about 

 60°; axillary scale of pectoral about 50 "/o of fin, 2.4 

 in head; a median dark line posterior to anal fin. 



guianensis (Eigenmann) 1912, p. 217. 

 8 b. Eye 5.5— 6.25 °/o of SL, 3.7— 4.1 in head; cheek scarcely 

 as long as eye, without a definite posterior angle; axil- 

 lary scale of pectoral about 75''/o of length of fin, 2.0— 

 2.2 in head; no median dark line posterior to anal fin. 

 alleni (Myers) 1940, p. 219. 

 2 b. Origin of anal under, or in advance of, middle of dorsal base; 22—29 ^"^^^ rays. 

 9a. Anal with 28 or 29 rays; pectoral extending to midlength of pelvic. 



nattereri (Steindachner) 1879, p. 220. 

 9b. Anal with fewer than 28 rays; pectoral usually failing to reach base 

 of pelvic. 



loa. Gill rakers 28-34 + 36-45; depth about 26-28. 5''/o of SL; pec- 

 toral extending slightly beyond base of pelvic, 19— 2o''/o of SL. 



pallida (Starks) 191 3, p. 221. 

 lob. Gill rakers 18 or fewer on upper limb, 24 or fewer on lower limb; 

 depth 2 5*'/o of SL or less; pectoral failing to reach base of pelvic, 

 i6.7''/o of SL. 



1 1 a. Maxillary extending beyond orbit a distance about equal to 

 diameter of eye, i5-2o'*/o of SL; mandible 1 5.8-1 8.8; gill 

 rakers 17 or 18 + 19—24; origin of anal under or slightly 

 behind middle of dorsal base. 



12a. Depth of body i7.5-2o"/o of SL; head 25.5-28''/o; 

 postorbital part of head 12-13. 3''/o; mandible 17.8- 

 i8.8''/o ; silvery lateral band poorly defined, narrower than 

 eye. eAongata (Meek and Hildebrand) 1923, p. 223. 

 12b. Depth of body 22-25«/o of SL; head 22.7-23.70/0; 

 postorbital i o. 7-1 1 "/o; mandible 1 5.8-1 6.3 "/o ; silvery 

 lateral band well defined, broader than eye. 



lepidentostole (Fowler) 191 i, p. 224. 



1 1 b. Maxillary extending beyond orbit a distance equal to only 



half of diameter of eye, 1 2-1 5 "/o of SL; mandible 12. 3-14. 8; 



gill rakers 10—12 + 15—17; origin of anal well in advance of 



middle of dorsal base, blackburni Hildebrand 1943, p. 226. 



I b. Maxillary extending a little less than diameter of pupil beyond orbit. 



Subgenus Amplova. 

 jamesi (Jordan and Seale) 1926, p. 227. 



