eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 273 



forked, the lobes equal, 3.5 in the length; anal emarginate, the highest rays reaching 

 considerably beyond the tip of the last ray; origin of ventrals near middle of body, 

 not reaching anal by about four scales; pectorals reaching ventrals. 



Straw-color, darker above; a conspicuous black band from tip of snout to end 

 of middle caudal rays; each scale above the lateral line with a dark spot at its 

 base, or along the middle of the back with a dusky tip; scales between the lateral 

 line and ventrals and anal with similar, but smaller, spots; a conspicuous black spot 

 on the tip of anterior dorsal rays; fins otherwise hyaline. 



Chilodus Muller and Troschel. 

 Chilodus Muller and Troschel, Horse Ichth., I, 1845, 26 (punctatus). 

 Camotropus Gunther, Catalogue, V, 1864, 297 (labyrinthicus and punctatus). 



Type, Chilodus punctatus Muller and Troschel. 



Fourth gill-arch dilated behind, its surface corrugated; anal elongate, scarcely 

 emarginate; each jaw with a series of feeble, truncate, incisor-like teeth; scales 

 large, entire; lateral line straight, complete; mouth small, terminal. 



Alimentary canal about 1.33 times the length of the entire fish. Vertebrae 

 12 + 17, not counting the coalesced vertebra?. 



130. Chilodus punctatus Midler and Troschel. (Plate XXXV, fig. 4.) 



Chilodus punctatus Muller and Troschel, Horse Ichth.. I, 1845, 26, pi. 4, fig. 2 

 (Lake Amucu, Guiana); in Schomburgk, Reisen, III, 1848, 634 (Swamps in 

 savannas). — Kner, "Familie der Characinen," i, 1859, 15. — Eigenmann and 

 Eigenmann, Proc. U. S. Nat, Mus., XIV, 1891, 79. — Eigenmann, Repts. 

 Princeton Univ. Exp. Patagonia, III, 1910, 424. 



Citharinus chilodus Cuvier and Valenciennes, Hist. Nat. Poiss., XXII, 1848, 103. 



Ccenotropus punctatus Gunther, Catalogue, V, 1864, 297. — Vaillant, Bull. Mus. 

 d'Hist. Nat,, V, 1899, 155 (Carnot). 

 Eight specimens, 37-60 mm. Rupununi. (C. M. Cat, No. 2205a-c; I. U. Cat. 



No. 12360.) 



One specimen, 56 mm. Konawaruk. (C. M. Cat. No. 1913.) 



One specimen, about 38 mm. Gluck Island. (C. M. Cat, No. 1914.) 



Forty-two specimens, 40-61 mm. Rockstone. (C. M. Cat. No. 1915a-e; 



I. U. Cat, No. 12217.) 



Eleven specimens, 55-82 mm. Crab Falls. (C. M. Cat. No. 1916a-c; I. U. 



Cat, No. 12218.) 



Head 3.66; depth 3; D. 11; A. 12; scales 4-25 to 27-4; eye .75 in snout, 3 



in head, 1 in interorbital. 



