1873. ] 681 [Cope. 
GASTRODERMUs Cope. Coracoids not enclosing the ventral region, 
which is covered with soft skin ; dorsal soft rays 6-7. 
. ambiacus Cope, Proceed. Acad. Phila. 1872, 280. 
. trilineatus Cope, 1. c. 281, Pl. VI, fig. 2. 
. acutus Cope, 1. c. 281. 
. amphibelus Cope, 1. ¢. 282. 
. armatus Giinth. Proceed. Zool. Soc. Lond., 1868, 230, cut. 
. agassizit Steind. loc cit. sup. 90, Pl. XII, f. 2. 
. elegans Steind. 1. c. 93. 
. natterert Steind. |. c. 95, Pl. XI, f. 1. 
RAWRVWAkRWAR 
28. GASTRODERMUS ARMATUS Gthr. 
Coll. 1878. 
29. GASTRODERMUS AMBIACUS Cope. 
Coll. 1873. Nauta. 
30. CALLICHTHYS ASPER Quoy. Gainn. 
Coll. 1873. Nauta. 
31. HoPpLOSTERNUM LONGIFILIS Cuv. Val. 
Coll. 1873. Nauta. 
32. LoRICARIA CATAPHRACTA L. 
Coll. 1873. The Marafion. 
33. LORICARIA ROSTRATA Spix. 
Coll. 1873. 
34. LIPOSARCUS JEANESIANUS Cope, Proceed. Acad. Phila., 1874, p. 135. 
Coll. 1878. Nauta. 
35. LIPOSARCUS SCROPHUS Cope, l. c. p. 136. 
Coll. 1873. Nauta. 
36. PLECOSTOMUS VIRESCENS Cope, l. c. 137. 
Coll. 1873. 
37. ARGES SABALO Cuv. Val. 
Rio Urubamba ; altitude 10,090 feet. 
38. TRICHOMYCTERUS DISPAR Tsch. Cope, Proceed. Amer. Philos. Soc., 
1877, p, 30. 
Sources of the Ucayale at Urubamba, 10,000 feet, and Tinta, 11,400 feet. 
39. TRICHOMYCTERUS GRACILIS (?) Cuv. Val., Cope, loc. cit. p. 30. 
Tinta, 11,400 feet. 
ASPREDINID &. 
40. BUNOCEPHALUS MELAS Cope, loc. cit. 1872, p. 182. 
Coll. 1873. Nauta. 
41. DysICHTHYS CORACOIDEUS Cope, I. c. p. 133. 
Coll. 1873. Nauta. 
PROC. AMER. PHILOS. soc. xviI. 101. 4G. PRINTED JUNE 27, 1878. 
