Amtrican Cichlid Genus Ciclilosoma^ &c. 443 



After the description of C. melanurum (p. 231) should be 

 inserted : — 



Cichlosoma labridens. 



Heros ( Cichlas^oma) lahricUns, Pellegr. Bull. Miis. Pari', 1903, p. 122. 

 Cichhisoma labridens, Pellegr. Mem. Soc. ZooJ. France, xvi. 1903, 



p. 207, pi. vi. fig. 1 (1904f. 

 Cichlasoma Bartoni (non Bean), Meek, Zool. Pub. Columbian Mus. v. 



1904, p. 211. 

 Cichlosoma Bartoni (part.), Regan, supra, p. 327. 



Depth of body 21-25 in the length, lengtli of head 2|-3;^. 

 Snout a little shorter than postorbital part of head. Diameter 

 of eye 4-5i in the length of head, interorbital width 3. 

 Depth of prieorbital l-lf the diameter of eye. ]\raxillary 

 not extending to below the eye ; jaws equal anteriorly ; fold 

 of the lower lip subcontinuous or not continuous ; cheek 

 with 4-6 series of scales ; 6-8 gill-rakers on the lower part 

 of the anterior arch. Scales 30-32 ~, 21 or 3 between 

 lateral line and base of anterior part of soft dorsal. Dorsal 

 XV-XVI 10-12, commencing above or in advance of the 

 axil of pectoral, the spines subequal from the fifth or sixth 

 to the thirteenth or fourteenth, thence increasing to the 

 last, which is f the length of head. Anal V (VI) 8-9. 

 Pectoral nearly | the length of head, extending about to above 

 the vent ; ventral extending nearly to origin of anal. Caudal 

 rounded or subtruncate. Caudal peduncle from ^ to as long 

 as deep. Olivaceous, sometimes with 4 or 5 dark cross-bars 

 on the posterior part of the body ; sometimes the lower part 

 of the head and abdomen blackish and a large dark blotch 

 on the caudal peduncle ; upper surface and sides of head 

 often covered with small dark spots ; fins greyish or dusky. 



Rio Panuco and its tributaries, Mexico. 



The above description is based on six specimens, 80-175 mm. 

 in length, from the Kio Verde. 



This species is very closely allied to C. melanurura. 



Cichlosoma Gadovii (p. 232). 

 The synonymy of this species should read : — 



Cichlasotna melanurum (part.), Meek, Zool. Pub. Columbian Mus. v. 

 1904, p. 219. 



Cichlosoma aureum (p. 320). 



Specimens have been received under the names of 

 Thorichthys Helleri and T. EUiotti. The former have the 



