American Cichlid Genus Cichlosoma. 227 



on the side, usually more or less confluent to form a longi- 

 tudinal band ; a dark spot on the base of caudal ; vertical fins 

 dusky, the dorsal with some light spots posteriorly. 



Southern Mexico. 

 1-3. (147-172 mm.) types of tlie species. Mexico. M. Salle. 



15. Cichlosoma macidicauda, sp. n. 



Heros parma (part.), Giiuth. Cat. P'ish. iv. p. 285 (1862), and Trans. 



Zool. Soc. vi. 1869, p. 449. 

 Cichlasoma parma (part.), Jorcl. & Everm. Bull. U.S. Nat. Mus. xlvii. 



1898, p. 1519. 

 Cichlasoma fenestratum , yar. parma, Pellegr. Mem. Soc. Zool. France, 



xri. 1903, p. 210 (1904). 



Depth of body l|-2 in the length, length of head 25-3^. 

 Snout as long as the postorbitai part of head (in the aoult), 

 or a little shorter (in the young). Diameter of eye 3-4j m 

 the length of head, interorbital width 2l-2j. Depth of 

 jirceorbital %-\\ the diameter of eye. Maxillary extending 

 to between nostril and eye; jaws equal anteriorly; fold of 

 the lower lip not continuous ; cheek with 4 or 5 series of 

 scales; 8 or 9 gill-rakers on the lower part of the anterior 

 arch. Scales 32-35 ^^, 4 between lateral line and base of 

 anterior part of soft dorsal. Dorsal* XVI-XVII 12-14, 

 commencing above the extremity of operculum, the spines 

 only slightly increasing after the sixth, the last 5 or nearly 

 ^ the length of head ; soft tin, when laid back, extending to 

 anterior ^ (young) or beyond the middle (adult) of caudal. 

 Anal YI-VII 9-10. Pectoral a little shorter than the head, 

 extending to above the vent ; ventral extending to tlie 

 origin of anal or beyond. Caudal subtruncate. Caudal 

 peduncle \-\ as long as deep. Sides of body and vertical 

 fins usually with dark spots ; a large dark blotch on the 

 caudal peduncle. 



Central America. 



1-4. (135-189 mm.) types of the Lake Yzabal. O. Salvhi, Esq. 



species. 



5. (223 mm.) Eio Motagua. 0. Salvin, Esq. 



6-10. (205-301 mm.) Rio Chacrres. O. Salvin, Esq. 



11-13. (68-90 mm.) Puo Chagres. O. Salvin, Esq. 



16. Cichlosoma fenestratum. 



Chromisfenestrata, Giinth. Proc. Zool. Sue. 1860, p. 318. 

 Jleros parma (part.), Giinth. Cat. Fish. iv. p. 285 (1862), and Trans. 

 Zool. Soc. vi. 1869, p. 449. 



* Of 13 specimens 10 have XVII 13, 2 have XVII 12, and 1 has 

 XVI 14 dursal rays. 8 have VI 10, 4 have VI 9, and 1 has VII 10 

 anal ravft. 



