A>7ierican Glchlid Genus Cichlosami. 329 



Rivors of Siaaloa and Jalisco, Mexico. 



1. (07 mm.) co-type of Rio Presidio. Dr. D. S. .Jordan, 



the species. 

 2-4. (104-180 mm.) Rio Presidio Herr A. Forrer. 



53. Cichlosoma mento. 



Hnms mento, Vaill. & Pellegr. Bull. Mu«i. Paris, 1902, p. 8S ; Pellcn-. 



Mem. So(?. Zool. France, xvi. 1903, p. 229 (1904). 

 Cichlmoma mento, Meek, Zool. Pab. Columbian Mas. v. 1904, p. 207. 



Depth of body 2|-2f in the length, length of haad 2*-3. 

 Snout shorter than postorbital part of head. Diameter of 

 eye 4-1 J in the length of head and 1^- in the interorbital 

 width. Maxillary not extending to below the eye ; lower jaw 

 projecting; anterior teeth forming canines ; fold of the lower 

 lip continuous ; cheek with 6-8 series of scales ; 8 gill-rakei's 

 on the lower part of anterior arch. Scales 29-30 ~^. Dorsal 

 XVI 10, the spines only slightly increasing in length after 

 the fifth, the last }. the length of head. Anal V 7-8. Pec- 

 toral I the length of head. Caudal rounded. Candal 

 peduncle as long as deep. Violaceous ; soft vertical fins 

 spotted. 



Southern Mexico, 



The types, from the Rio Negro, measure from 98 to 

 180 mm. 



54. Cichlosoma Festa. 



Heros Festce, Bouleng. Boll. Mus. Torin. xiv. 1899, No. 335, p. G ; 

 Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 230 (1904). 



Depth of body 2? in the length, length of head 2f . Snout 

 nearly ^ the length of head. Diameter of eye 5j in the 

 length of head, interorbital width 3. Depth of prseorbital 

 1^ the diameter of eye. Maxillary exposed distally, not 

 extending to below the eye; praemaxillary processes ex- 

 tending to above anterior ^ of eye; lower jaw slightly 

 projecting; fold of the lower lip continuous; upper jaw 

 with the 2 anterior teeth of the outer series differentiated as 

 a pair of canines ; lower jaw with the anterior 2 or 3 teeth 

 on each side forming distinct canines ; cheek with 5 or 6 

 series of scales, with a naked area between the lowest series 

 and prseoperculum (probably covered in the young with 

 1 or 2 additional series of scales) ; 9 gill-rakers on the lower 

 part of anterior arch. Scales 30 ^*, 3^ between lateral line 

 and base of anterior rays of soft dorsal. Dorsal XVI (11) 12, 

 the spines subequal from the sixth to the fourteenth, thence 

 Ann. & Mag. N. Ili.st. Scr. 7. Vol xvi. 2-2 



