eigenmann: the FRESHWATER FISHES OF BRITISH GUIANA 489 



331. jEquidens maronii Steindachner. 

 Acara maronii Steindachner, "Flussfische Siidamerika's," ii, 1881, 41, pi. 2, fig. 4 



(Maroni River, Guiana). — Pellegrin, "Cichlides," 143, in Mem. Soc. Zool. 



France, XVI, 1903, 179 (Maroni; Ouanary). — Regan, Ann. and Mag. Nat. 



Hist., (7), XV, 1905, 344 (Surinam; Demerara). 

 i-Equidens maronii Eigenmann, Repts. Princeton Univ. Exp. Patagonia, III, 1910, 



472. 



Five specimens, 53-84 mm. Mud-flats below Wismar. (C. M. Cat. No. 

 2382a-c; I. IT. Cat. No. 12522.) 



One specimen, 60 mm. Barima River. (C. M. Cat. No. 2384a.) 



Twelve specimens, the smallest 91 mm. Kumaka. (C. M. Cat. No. 2385a-d; 

 I. U. Cat. No. 2523.) 



Head 3; depth 1.66-1.75; D. XV, 10; A. 111,9-11; lateral line 15 + 7; scales 

 22-24; eye 3.25 in the head, .7 in the preorbital, 1.3 in the eye in the larger; eye 

 in the center of the head, measuring to the upper angle of the gill-opening. 



Short and deep, oval, the dorsal profile not much more arched than the ventral; 

 the caudal peduncle very short, one-fourth to one-third as long as deep; maxillary 

 not quite reaching the eye; premaxillary-maxillary border 4 in the head. Lower 

 lip with a frenum. Cheeks with three series of scales; preopercle with a single 

 series of scales; three scales between the lateral line and the dorsal; basal parts 

 of dorsal and anal densely scaled; lateral line not forked on the caudal. 



Dorsal spines subequal from the third, the last one-half or less than one-half 

 the length of the head; caudal rounded; pectoral about as long as the head. 



A black band from in front of the dorsal through the eye and through the 

 angle of the preopercle; a large ocellated spot between the lateral line and the 

 posterior dorsal spines. Sides with dark streaks between the rows of scales. Fins 

 unspotted. 



332. iEquidens vittatus (Heckel). 



Acara vittata Heckel, Ann. Wiener Mus., II, 1840, 346 (Cujaba). — Steindachner, 

 "Chromiden Amazonenstromes," 1875, 12, pi. 3, fig. 1 (Cujaba; Paraguay). — 

 Boulenger, Boll. Mus. Zool. ed Anat. Comp. Torino, XV, 1900, — (Caranda- 

 sinho).— Vaillant, Nouv. Arch. Mus. d'Hist. Nat., (4), II, 1900, 125 (Carnot; 

 Lunito).— Pellegrin, Bull. Mus. d'Hist. Nat., VIII, 1902, 182, part (Tonan- 

 tins); "Cichlides," 137, in Mem. Soc. Zool. France, XVI, 1903, 173 (Guiana; 

 Colombia; Tonantins). — Regan, Ann. and Mag. Nat. Hist., (7), XV, 1905, 

 333.— von Ihering, Rev. Mus. Paulista, VII, 1907, 310 (Rio Cabriales, 

 Valencia, Venezuela). 



