28 ACANTHOPTERYGII. 
Depth of preorbital 3 the diameter of eye (in a specimen of 115 mm.) or 
equal to it (in the adult fish) ; caudal peduncle 3 to # as long as deep . 51. motaguense. 
IV. D. XVIII 10-12. A. VI-VII 8-10. Preemaxillary spines 2 or slightly more than 3 the 
length of head, extending to above posterior edge of orbit; maxillary extending to below 
anterior 4 or middle of eye ; canines strong; last dorsal spine 4 the length of head. 
D. XVIII10. A. VII 8. Maxillary extending to below middle of eye; 
depth of preorbital 2 to 4 the diameter of eye (in specimens of 187 
tol95 mm.) . . . . 6 ee ee ee ee ee ee eee BR, managuense. 
D. XVIII 12. A.VI9-10. Maxillary extending to below anterior 4 of eye ; 
depth of preorbital 3 to 2 the diameter of eye (in specimens of 140 to 
144mm.) 2. 2. 1. ee eee ee ee eee eee ee 58, dovit. 
41. Cichlosoma istlanum, Jord. & Snyder, 1899. 
Cichlosoma istlanum, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 326. 
Hab. Mexico, Rio Balsas and its tributaries. 
42, Cichlosoma steindachneri, Jord. & Snyder, 1899. 
Cichlosoma steindachneri, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 444. 
Hab. Mexico, Rio Panuco and its tributaries. 
43. Cichlosoma bartoni, Bean, 1892. 
Cichlosoma bartoni, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 445 
Hab. Mexico, Rio Panuco and its tributaries. 
44, Cichlosoma beani, Jord., 1888. (Tab. VI. fig. 1.) 
Cichlosoma beani, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 828. 
Hab. Mexico, rivers of Sinaloa and Jalisco. 
45. Cichlosoma mento, Vaill. & Pellegr., 1902. 
Cichlosoma mento, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 329. 
Hab. Sournern Mexico, Rio Negro. 
46. Cichlosoma urophthalmus, Giinth., 1862. 
Cichlosoma urophthalmus, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 382. 
Hab. Mexico, Yucatan; British Honpuras; Guatemata, Lake Peten (Salvin). 
47. Cichlosoma trimaculatum, Giinth., 1869. 
Cichlosoma trimaculatum, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 333. 
Hab. Soutnern Mexico, Oaxaca and Tehuantepec; GuatemMaLa, Huamuchal and 
Chiapam (Salvin). 
