134 MEMOIRS OF THE CARNEGIE MUSEUM. 
moderate, covered by a transparent membrane. Scales small, cycloid; lateral line 
straight, complete, rather obscure in caudal region. Origin of anal about the 
length of the pectoral behind the vertical from the gill-opening; caudal appendage 
long and slender. 
Fig. 7. Hypopomus brevirostris (Steindachner). 
Species or Hyporomus. 
a. Caudal peduncle 4.5 to 5 in the total length; length of the head just equal to, or usually less than, the 
greatest depth of the body; head somewhat truncate, 8.25 to 9.25 in the length to the end of the anal; 
eye abouti2:5ani the imteroculanidistancemeieeen eee aee ee eer erer ene brevirostris. 
aa. Caudal peduncle 3 to 3.5 in the total length; length of the head just equal to, or usually greater than, the 
greatest depth of the body; head somewhat pointed, 7.5 to 10 in the length to the end of the anal; eye 
notmore than.2 im theunteroculandistancesse cerimemeer emcees cane eeeene ae eeeee artedi. 
9. Hypopomus brevirostris (Steindachner). 
Rhamphichthys brevirostris StEINDACHNER, Die Gymnotide, 6, pl. I, fig. 2, 1868 
(Guaporé); Gitnruer, Cat., VIII, 6, 1870; SrervpacHner, Fisch-f. Cauca 
and Guayaquil, 37, 1880 (Santarem, Cauca, Rio Guaporé); PrrRuara, Ann. 
Mus. Civico Storia Nat. Genova, Ser. 2, Vol. X, 56, 1891 (Central Chaco); 
BouLENGER, Trans. Zo6l. Soc., XIV, 1896, 38 (Descalvados). 
Brachyrhamphichthys brevirostris EKIGENMANN AND EIGENMANN, Proc. U. 8. Nat. 
Mus., XIV, 1891, 62; Eraznmann, Ann. N. Y. Acad. Sci., VII, 1894, 625 
(Lower Amazon and Itaituba on the Tocantins). 
Hypopomus brevirostris EIGENMANN AND KENNEDY, Proc. Acad. Nat. Sci. Phila., 
1903, 530 (Campo Grande, Arroyo Ohepatiaitinn: EIGENMANN AND Wann, 
Proc. Wash. Acad. Sci., VII, 170, 1905 (Cauea, Amazon and tributaries, 
Paraguay); VON IHERING, Os Peixes do Brazil, 1907 (Amazonas); EIGENMANN, 
Repts. Princeton Univ. Exp. Patagonia, III, 449, 1910 (Cauea, Guiana to 
Paraguay). 
10055 I. U. M., two, 140 and 150 mm. Campo Grande. 
10057 I. U. M., two, 50 and 65 mm. Arroyo Chagalalina. 
10054 I. U. M., one, 140 mm. Matto Grosso. 
5097 I. U. M., six, 70-105 mm. Itaituba, Brazil. 
5095 I. U. M., two, 90 and 100 mm. Lower Amazon. 
