20 ACANTHOPTEli.TGII. 



C. lifasciatum probably inhabits Southern Mexico, like the other species described 

 by Dr. Steindachner in his memoir. 



7. Ciclilosoma guttiilatimi, Giinth., 1804. 



Cichlosouia yuttulatum, Regan, Auii. Alag. N. H. (7) xvi. 1905, p. 2,29'. 



Hah. SouTiiEKX Mexico, Eio de Sarabia [Bailer i) ; Guatemala, Lakes Amatitlan and 

 Nacasil (Sahiit). 



Ciclilosoma zonatum, Meek (Proc. Biol. Soc. Washington, xviii. 1905, p. 245), from 

 Tehuantepec, may be identical with C. guttulatum. 



8. Ciclilosoma iiiicroplitlialiiius, Gunth., 1862. (Tab. VII. fig. 2.) 



CichJosoma microphthalmus, Regan, \\n\. j\lag. N. H. (7) xvi. 1905, p. 230. 

 Ciclilosoma r/uentheri, Regan, t. c. p. 2o3. 



Hall. Guatemala, Vdo Motagua [Salviii). 



After re-examination of the types 1 am unable to recognize C. guenflieri, Pellegrin 

 {C. oljlonf/ii.s, Giinth., ncc Casteln.), as distinct from C. micro]:)ht]mhnus. 



9. Ciclilosoma iiielaiiuriini, Giinth., 1SG2. 



Cic/dosoma melanurum, Regan, Ann. ilag. N. H. (7) xvi. 1905, p. 231. 

 Hah. Guatemala, Lake Peten (Salviv). 



10. Ciclilosoma labrideiis, Pellegr., 1903. 



Ctcklusoma lahridens, Regan, Ann. ilag. N. H. (7) xvi. 1905, p. 443. 

 Hah. Mexico, Eio Pannco and its tributaries. 



11. Ciclilosoma gadovii, Regan, 1905. (Tab. V. figg. 2, 2 a.) 



Ciddosoiaa ijadovii, Regan, Ann. Mag. N. H. (7) xvi. 1905, p. 232. 



Hah. iSouTiiEKN Mexico, Motzorongo in Vera Cruz {Gadoiv), Oaxaca, Tehuantepec. 



Dr. INIeek's repetition * of the error of confusing C. gadovii with C. melanurum 

 makes it necessary for me to call attention to the more imjiortant points in which these 

 species differ. C. melanurum has been twice figured, by Gtintlaer (Trans. Zool. Soc. vi. 

 1869, t. 72. fig. 3) and liy Steindachner, under the name //cro.v melanopogon{DejAi.sc\\v. 

 Ak. Wien, xxiii. 1864, t. 1. fig. 3). A comparison of these figures with the one now 

 given of C. gadurii \^']\l show the notable difference in marking between the two 

 species and also that the snout is more produced and has its up[ter profile less decurved 

 in C. mela/imrum. The interorbital space is much wider in C. e/adovli than in 

 C. melanuruin, its width being contained from 2;^ to 2| times in the length of the head in 

 four specimens of the former, measuring from 130 to 240 mm. in total length, and 2^3- to 



* I'roc. liiol. Soc. Waah. xviii. 1005, p. 245. 



