American Cichlid Genus Oiclilosoma, &c. 439 



anteriorly ; cheek with 3 series of scales ; 8 gill-rakers on 

 the lower part of anterior arch. Scales 28 j-|. Dorsal 

 XVIII 9, commencing above the opercular cleft, the spines 

 subequal from the fifth, tlie last a little more than ^ the 

 length of head ; soft fin scaly at the base, when laid back 

 extending nearly to middle of caudal. Anal XI 8. Pectoral 

 as long as the head, extending to above middle anal spines ; 

 ventral extending to sixth anal spine. Caudal rounded. 

 Caudal peduncle f as long as deep. Olivaceous, with darker 

 cross-bars ; a dark spot on the middle of the side ; a 

 longitudinal band from eye to lateral spot. 

 Lake Managua. 



1. (87 mm.) type of the species. Lake Managua. Capt. J. M. Dow. 



Uaru. 



Uaru, Heck. Ann. Mus. Wien, ii. 1840, p. 330 ; Gdntli. Cat. Fish. iv. 

 p. 302 (1862); Eigenm. & Bray, Ann. Ac. N. York, vii. 1894, 

 p. 612 ; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 248 (1904). 



Acara (part.), Steind. Sitzb. Ak. Wien, Ix.xi. 1875, p. 03. 



Closely allied to Cichlosoma, and especially to C. psittacum, 

 differing in the dentition, the rather slender teeth being 

 compressed, pointed in the young and wdth rounded apices 

 in the adult. Scales rather smali^ those of the lateral line 

 larger than the rest. 



A single species from the Amazon. 



Uaru mnphiacanthoides. 



Uaru amphiacanthoides, Heck. Ann. Mus. Wien, ii. 1840, p. 331 ; 



Giinth. Oat. Fish. iv. p. 302 (1862) ; Eigenm. & Bray, Ann. Ac. 



N. York, vii. 1894, p. 0L2; Pellegr. Mem. Soc. Zool. France, xvi. 



1903, p. 248 (1904). 

 Uaru obscurtmi, Giinth. I. c. 

 Acara (Heros) amphiacanthoides, Steind. Sitzb. Ak. Wien, Ixxi. 1875, 



p. 94. 

 Acara (Heros) imperialis, Steind. Sitzb. Ak. Wien, Ixxx. 1879, p. 161. 

 Uaru imperialis, Pellegr. ^. c. p. 249. 



Depth of body l^-lj in the length, length of head 3-3^. 

 Diameter of eye 3^-3f in the length of head, interorbital 

 width 2-2|. Depth of pra^orbital 1^-1 f the diameter of eye. 

 Jaws equal anteriorly ; maxillary not extending to below 

 the eye ; fold of the lower lip not continuous ; cheek with 

 9-12 series of scales ; 7 or 8 giU-rakers on the lower part of 

 anterior arch. Scales in a longitudinal series, 55-60 above 

 the lateral line, 46-52 bdow it ; scales in a transverse series 

 ^l-i^. Lateral line 18-21 + 10-13. Dorsal XV-XVI (13-14) 



21- Jo 



