eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 177 



50. Pimelodus altipinnis Steindachner. 



Pimelodus altipinnis Steindachner, " Icthyologische Notizen," i, 1864, 14, pi. 2, 

 figs. 3 and 4 (Demerara) ; " Icthyologische Beitrage," iv, 1876, 55, pi. 11 (Para; 

 Santarem; Cameta). — Eigenmann and Eigenmann, Proc. Cal. Acad. Sci., 

 (2), 1, 1888, 135 (Para); Occasional Papers Cal. Acad. Sci., I, 1890, 180 (Para). 

 — Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 388 — 

 ? Perugia, Ann. Mus. Genova, (2), XVIII, 1897, 18 (Rio Beni).— Eigen- 

 mann and Bean, Proc. U. S. Nat. Mus., XXXI, 1907, 660 (Amazon). 

 The type of this species came from Demerara. It is 86 mm. long. No speci- 

 mens were secured by me. The species has the general characters of a Pimelodella, 

 and it would not be surprising if the small type in the Vienna Museum should 

 prove to be a Pimelodella and distinct from the specimens subsequently referred to 



the same name. 



Gceldiella Eigenmann and Norris. 



Goeldiella Eigenmann and Norris, Rev. Mus. Paulista, IV, 1900, 353 (eques). 



Type, Pimelodus eques Miiller and Troschel. 



This genus differs from the related genera Pimelodus and Pimelodella in the 

 character of the caudal fin, which is unequally lobed. 



51. Goeldiella eques (Miiller and Troschel). 



Pimelodus eques Muller and Troschel, in Schomburgk, Reisen, III, 1848, 628 (all 

 rivers of Guiana); Horse Ichth., Ill, 1849, 5 (Guiana). — Gunther, Catalogue, 

 V, 1864, 116 (copied). — Steindachner, "Icthyologische Beitrage," v, 

 1876, 99 (Amazon near Fonteboa; Teffe; Obidos; Villa Bella; Jose Fernandez; 

 XingujTonantins; Hyutahy; Lake Hyanuary ) . — Eigenmann and Eigenmann, 

 Proc. Cal. Acad. Sci., (2), 1888, 134 (localities given by Steindachner); Occa- 

 sional Papers Cal. Acad. Sci., I, 1890, 166; Proc. U. S. Nat. Mus., XIV, 1891, 

 29.— Pellegrin, Bull. Mus. d'Hist, Nat., V, 1899, 405 (Manaos). 



Goeldiella eqties Eigenmann and Norris, Rev. Mus. Paulista, IV, 1900, 353. — 

 Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 388. 

 Eleven specimens, 91-148 mm. Rupununi. (C. M. Cat. No. 1606o-c; I. U. 



Cat. No. 12008.) 



One specimen, 205 mm. Rockstone. (C. M. Cat. No. 1607.) 



Head 3.5-3.75; depth 4.75-5.25; D. 1,6; A. 10 or 11. 



Profile in front of dorsal nearly straight, lower outline nearly straight from 



caudal to below eye; interorbital flat; bones of the head from the nares to the 



dorsal plate and the dorsal plate with reticulated ridges; occipital fontanel a 



narrow slit in specimens up to a length of at least 150 mm. 



