American Cichlid Genus Cichlosoma. 317 



Mils, xlvii. 189S, p. lo34; Pellegr. Mem. Soc. Zool. France, xvL 



1903, p. 237 (1904). 

 Heros iohochihts (part.), Giiutli. Trans. Zool. Soc. vi. 1809, p. 4^57. 

 Heros basilaris, Gill & Branslord, Proc. Ac. Philad. 1877, p. 182 ; 



Pellegr. t. c. p. 238- 

 Cichlasuma basilare, Jord. & Everm. t. c. p. 1532. 



Depth of body 2-2 j in the length, length of head 2^-3. 

 Snout a little shorter than postorbital part of head. 

 Diameter of eye 3;g-4|- in the length of lieacl, interorbital 

 width 2^-3. Depth of prseorbital about equal to tlie dia- 

 meter of eye. Maxillary not extending to below the eye ; 

 prseraaxillary processes extending to above anterior margin of 

 eye ; jaws equal anteriorly ; fold of the lower lip continuous 

 or subcontinuous ; cheek with 4 or 5 series of scales ; 9 or 

 10 gill-rakers on the lower part of anterior arch. Scales 

 31-33 ^i, 2.'>-3.^ between lateral line and base of anterior 

 rays of soft dorsal. Dorsal XVl-XVIl 11-12, commencing 

 above the opercular cleft, the spines subequal from the sixth 

 to the fourteenth, thence increasing to tlie last, which is 

 }, the length of head ; soft fin, when laid back, extending to 

 the middle of caudal or beyond. Anal VII 8-9. Pectoral 

 as long as the head, extending to above the third or fourth 

 anal spine ; ventral extending beyond the origin of anal. 

 Caudal rounded. Ca\idal peduncle -g-i as long as deep. 

 Olivaceous or yellowish, tlie back darker, the dark colour 

 sometimes extending as cross-bars on the sides of the body; 

 sometimes a dark blotch on the middle of the side and a dark 

 spot at the base of the caudal. Fins pale yellow or wholly 

 or partly dark, sometimes spotted or barred. 



Nicaragua. 



1-3. (176-189 mm.) types of Lake Nicaragua. 0. Salviu, Esq. 



tlie species. 



4. (190 mm.) Lake Managua. Capt. J. M. Dow. 



tO. (ISO mm.) one of tlie Lake Nicaragua. Smithsonian Inst. 



types of H. basilaris. 



6. (138 mm.) Lake Nicaragua. Smithsonian Inst. 



Section 10. 



Three species from Nicaragua have the general form of 

 those of the tAVO preceding sections and arc evidently closely 

 allied to C. citi-'mellum, from which they differ in the excep- 

 •tionally thick lips and in the dentition. Upper jaw with the 

 anterior pair of teeth strongly enlarged ; lower jaw with the 

 two anterior pairs strong, subequal. Dorsal XVII 11-12. 

 Anal YII-VIII 8-9. Caudal rounded or subtruncate. 



