20 ACANTHOPTERYGII. 
C. bifasciatum probably inhabits Southern Mexico, like the other species described 
by Dr. Steindachner in his memoir. — 
7. Cichlosoma guttulatum, Giinth., 1864. 
Cichlosoma guttulatum, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 229°. 
Hab. SouTHERN Mexico, Rio de Sarabia (Buller!) ; Guatemata, Lakes Amatitlan and 
Nacasil (Salvin). | 
Cichlosoma zonatum, Meek (Proc. Biol. Soc. Washington, xviii. 1905, p. 245), from 
Tehuantepec, may be identical with C. guttulatum. 
8. Cichlosoma microphthalmus, Giinth., 1862. (Tab. VII. fig. 2.) 
Cichlosoma microphthalmus, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 2380. 
Cichlosoma guentheri, Regan, t. c. p. 238. 
Hab. GuatemaLa, Rio Motagua (Salvin). 
After re-examination of the types 1am unable to recognize C. guentheri, Pellegrin 
(C. oblongus, Giinth., nec Casteln.), as distinct from C. mecrophthalmus. 
9. Cichlosoma melanurum, Giinth., 1862. 
Cichlosoma melanurum, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 231. 
Hab. Guatemaua, Lake Peten (Salvin). 
10. Cichlosoma labridens, Pellegr., 1903. 
Cichlosoma labridens, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 443. 
Hab. Mexico, Rio Panuco and its tributaries. 
11. Cichlosoma gadovii, Regan, 1905. (Tab. V. figg. 2, 2 a.) 
Cichlosoma gadovii, Regan, Aun. Mag. N. H. (7) xvi. 1905, p. 282. 
Hab. SourHeRN Mexico, Motzorongo in Vera Cruz (Gadow), Oaxaca, Tehuantepec. 
Dr. Meek’s repetition * of the error of confusing C. gadoviz with C. melanurum 
makes it necessary for me to call attention to the more important points in which these 
species differ. C. melanurum has been twice figured, by Gtinther (Trans. Zool. Soc. vi. 
1869, t. 72. fig. 8) and by Steindachner, under the name Heros melanopogon (Denkschr. 
Ak. Wien, xxiii. 1864, t. 1. fig. 3). A comparison of these figures with the one now 
given of C. gadovii will show the notable difference in marking between the two 
species and also that the snout is more produced and has its upper profile less decurved 
in C. melanurum. The interorbital space -is much wider in C. gadovii than in 
C. melanurum, its width being contained from 21 to 22 times in the length of the head in 
four specimens of the former, measuring from 130 to 240 mm. in total length, and 2% to 
* Proc, Biol. Soc. Wash. xviii. 1905, p. 245. 
