ANNOTATED LIST OF THE SPECIES 123 
Type: Epapterus dispilurus Cope 
Upper Amazonia 
Like Auchenipterus in the transverse alignment. of the mental barbels at the 
symphysis, but unlike in lacking the adipose fin and retaining only a rudimentary 
dorsal, I, 3; no teeth; ventrals have receded in a caudal direction and elongated to 
14 rays; anal long; both postcoracoid and humeral processes present, the former 
sharply pointed. 
73. EPAPTERUS DISPILURUS Cope 
Epapterus dispilurus Cope, 1878, Proc. Amer. Phil. Soc., XVII, 677; 
Steindachner, 1882 (1883), Denksch. KK. Akad. Wiss. Wien, XLVI, 31, Peruvian Amazon: 
Eigenmann and Eigenmann, 1888, Proc. Cal. Acad. Sei., (2), I, 152; 
Eigenmann and Eigenmann, 1890, Occ. Papers Cal. Acad. Sci., I, 293; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 397. 
Fowler, 1939 (1940), Proc. Acad. Nat. Sci. Phila., XCI, 231, Contamana. 
Upper Amazons. 
Reported to Fowler under the vernacular name maparati. 
Family IV: Doradidae 
Due to the unusually high stages of water throughout the greater part of the 
Peruvian Amazon country during my visit in 1920 (W.R.A.) and the flooding of the 
smaller streams, our collections of Characins, Cichlids, and Poeciliids peculiar to 
smaller streams are not especially abundant. On the other hand, opportunity to 
collect such muddy-water forms as the Doradidae from larger streams, due to their 
taking refuge in the sloughs and estuaries, was good. With materials accumulated 
from other sources our Doradidae form part of the monograph of the family, Eigen- 
mann, 1925, the last of the great groups of fishes to be undertaken by him with un- 
impaired strength and zeal. The Astroblepidae were to have followed. 
Of the twenty-six genera and sixty-seven species recorded in the monograph, 
fifteen genera and twenty-two species belong to the range considered in this paper. 
Of these we have seventeen species and ten of the genera in the present collections. 
Seven of the genera and seven of the species are considered as new. 
Throughout Tropical America; fishes with a series of lateral plates, diminishing 
in size caudally, each with a backward-directed curved, pointed spine, also dimin- 
ishing correspondingly; fishes of moderate size; air-bladders with much specialized 
and variable Weberian apparatus, and themselves of extreme variability; dorsal 
usually short, and usually I, 6; dorsal spine variable; adipose usually present and 
short; pectoral spine long, doubly serrate (sometimes triply); head granular or 
striate; dorsal and pectoral spines with locking device; humeral process present, 
bordered above by a tympanum; six barbels, the narial lacking, barbels sometimes 
fimbriated, forming a dense, brush-like structure. 
