232 PROCEEDINGS OF THE ACADEMY OF [Apr., 



Hoplosternum melampterum (Cope). 



Callichthys vielamplerus Cope, Proc. Acad. Nat. Sci. Phila., 1871, p. 275. 

 Ambyiacu River. 



Nos. 8,318 to 28, A. N. S. P., cotypes of C. melampterus Cope. 

 Ambyiacu River, Ecuador. J. Hauxwell. Also two examples with- 

 out definite locality, from Cope. 



Dianema longibarbis Cope. 



L.c, p. 276, PI. 7, figs. 1-15. Ambyiacu River. 



Nos. 21,540 and 8,285, A. N. S. P., cotypes. Ambyiacu River, 

 Ecuador. J. Hauxwell. 



Cheenothorax semisoutatus (Cope). 



Corydorus semiscutatus Cope, I.e., p. 280, PI. 6, fig. 1. Ambyiacu River. 

 No. 8,289, A. N. S. P., type of C. semiscutatus Cope. Ambyiacu 

 River, Ecuador. J. Hauxwell. 

 Chaenothorax bicarinatus Cope. 



Proc. Amer. Philos. Soc, XVII, 1878, p. 679. Peruvian Amazon. 



No. 21,447, A. N. S. P., type. Peruvian Amazon. J. Orton. 



Brochis oaeruleus Cope. 



Proc. Acad. Nat. Sci. Phila., 1871, p. 277, PI. 7, fig. 2, PI. 9, fig. 3. Ambyiacu 

 River. 



Nos. 8,231 to 37, A. N. S. P., cotypes. Ambyiacu River, Ecuador. 

 J. Hauxwell. 



Corydorus acutus Cope. 



L.c, p. 281. Ambyiacu River. 



Nos. 8,292 and 93, A. N. S. P., cotypes. Ambyiacu River, 

 Ecuador. J. Hauxwell. These examples in very poor condition. 

 Possibly they may be found identical with C. punctatus (Bloch). 



Corydorus ambiacus Cope. 



L.c, p. 280. Ambyiacu River. 



Corydorus trilineatus Cope, I.e., p. 281, PI. 6, fig. 2. Ambyiacu River. 



No. 8,291, A. N. S. P., type of C. ambiacus Cope. Ambyiacu 

 River, Ecuador. J. Hauxwell. 



Nos. 8,294 and 95, A. N. S. P., cotypes of C. trilineatus Cope. 

 Ambyiacu River, Ecuador. J. Hauxwell. 



Also four examples from Peru, received from J. Orton. C. ambiacus 

 Cope has been identified with C. punctatus, though is here allowed 

 distinct until further studies can be made. C. amphibelus may 

 also be another synonym, and is only provisionally admitted here. 



Corydorus amphibelus Cope. 



L.c, p. 282. Ambyiacu River. 



No. 8,291, A. N. S. P., type. Ambyiacu River, Ecuador. J. 

 Hauxwell. 



