328 i\Ir. C. T. Jxegan on the Fishes of the 



not continuous ; anterior tcetli forming canines ; clicek with 

 5 or G series of scales ; 7 gill-rakers on the lower part of 

 anterior arch. Scales about 30 ^.,. Doi'sal XV-XVI 

 10-11, the spines increasing in length to the last, which is 

 \ the length of head ; soft hn extending a little bevond base 

 of caudal. Anal V (IV-VI) 8-9. Pectoral r! tlie'length of 

 head, not extending to above the anal ; ventral extending to 

 the vent. Caudal rounded. C^audal peduncle as long as 

 deep. Brownish, with about 6 indistine-t cross-bars on the 

 sides ; a dark spot at the base of caudah 



Rio Panuco and its tributaries, Mexico. 



The types of the species measure from 90-180 mm. in total 

 length, those of C. lahridens 200-220 mm. 



52. Cichlosoma Beam. 



Heros Beani, Jord. Proc.U.S. Nat. Mus. 1888. p. .33'J, and Proc. Cal. Ac. 

 Sci. 1895, p. 473 ; Jord. & Everm. Bull. U.S. Nat. Mus. xlvii. 1898, 

 p. 1538; Pellegr. Mem. Soc. Zonl. France, xvi. 1903, p. 230 (1904). 



Cichlasoma Beuni, Meek, Zcol. Pub. Columbian Mus. v. 1904, p. 210. 



Depth of body 2-2.1, in the length, length of head 2^-3. 

 Snout more than i the length of head (in the adult), less in 

 the young. Diameter of eye 3^-5 in the length of head, 

 intcrorbital width 3-3^. Depth of prteorbital a little greater 

 than diameter of eye (adult), | diameter of eye (young). 

 Maxillary slightly exposed, not extending to below the eye ; 

 prajmaxillary processes extending nearly to above middle of 

 eye; lower jaw slightly projecting; fold, of the lower lip 

 continuous ; upper jaw with the 2 anterior teeth of the 

 outer series more or less distinctly differentiated as a pair of 

 canines ; lower jaw with the 2 or 3 anterior teeth on each 

 side forming more or less distinct canines ; cheek with 6 or 

 7 scries of scales j 8 or 9 gill-rakers on the lower part of 

 anterior arch. Scales 30-31 ~|, 3 between lateral line and 

 base of anterior rays of soft dorsal. Dorsal XVI 11-12, the 

 spines slightly increasing in length to the last, which is about 

 I the length of head, or the middle spines sometimes sub- 

 equal ; soft fin, when laid back, extending to anterior \ of 

 caudal or beyond. Anal V 8-10. Pectoral nearly | the 

 length of head, not extending to above origin of anal ; ventral 

 extending to origin of anal. Caudal subtruncate or rounded. 

 Caudal peduncle about § as long as deep. Olivaceous, each 

 scale with a broon spot ; a dariv spot on the lateral line below 

 the posterior dorsal spines and another on the upper part of 

 the base of caudal; about 8 daik cross-bars in the young; 

 vertical fins with small dark spots. 



