Family XXI. Cichlid^e. 207 



pp. Lower lip with a frenum; preorbital 6 in page 



head octof as datum 218 



00. Anal spines 5 or 6 ; lower lip with a frenum, 

 or its anterior margin slightly free, 

 q. Body deep, its depth 2 to 2^; sides with 

 7 dark vertical bars ; lateral band faint or 



none parma 218 



qq. Body elongate; depth 2% to 2%; sides 

 with 7 dark vertical bands, and a con- 

 spicuous dark lateral band melanurum 219 



nn. Mouth very small, subinferior; maxillary 3! 



to 4 in head ; lower lip with a broad frenum ; 



tips of ventral fins not reaching anal fin; 



depth 2%. 



r. Preorbital $% in head; soft dorsal of 14 rays . .eigenmanni 220 



rr. Preorbital 2^ in head; soft dorsal of 10 or 



1 1 rays nebulifer 220 



193. Cichlasoma mento (Vaillant & Pellegrin). 



Heros mento Vaillant & Pellegrin, Bull. Mus. Hist. Nat. Paris, 

 1902, 87; Rio Negro, Southern Mexico. 



Head 3 ; depth 2% to 2%; D. xvi-10; A. v, 7 or 8; scales 6-29-12. 

 Body rather elongate; lower jaw very strong and prominent; the 

 outer series of teeth in each jaw large, the anterior ones forming 

 true canines; lower lip without frenum; eye small, 4^ in head, i}4 

 in interorbital area; eye nearer snout than posterior margin of opercle; 

 6 or 7 rows of scales on the cheeks ; dorsal spines increase to the fifth ; 

 middle rays of dorsal and anal produced ; the fifth anal spine longer 

 and stronger than the last dorsal; base of median fins scaly; caudal 

 rounded; pectoral rounded, % length of head. 



Color olivaceous, traces of dark punctulations on soft parts of 

 unpaired fins- Length about 7 inches. (Vaillant & Pellegrin.) 



Known only from the type locality. 



194. Cichlasoma salvini (Giinther). 



Heros salvini Giinther, Cat. iv., 294, 1862; Rio de Santo Isabel, 



Guatemala: Giinther, Fish. Cent. Amer., 460, pi. 73, fig. 3, 



1869: Jordan & Evermann, Bull. 47, U. S. Nat. Mus., 1898, 



1528. 



Southern Mexico and Guatemala. (Motzorongo; Refugio; El 



Hule; Perez; Obispo.) 



Head 2%; depth 2,1 to 2%; D. xvn, 10 or 11; A. vn or vni, 

 9; scales 6-29-10. Body rather deep, compressed; anterior half of 



