American Cichlicl Genus Ciclilosoma. 73 



Tocantins, is in bad condition, hut the species is closely allied 

 to C. autochthon. As the specimen described ahove agrees 

 well enough with his description of H. oblongus, I provi- 

 sionally refer it to that species. 



Section 4, 



Body ovate ; scales of lateral line of the same size as those 

 above and below it ; scales of thoracic region considerably 

 smaller than those on the sides of the body. Mouth moderate 

 or rather large (maxillary extending to or nearly to below 

 the eye, snout longer than postorbital part of head), mode- 

 rately protractile ; maxillary very slightly exposed distally ; 

 teeth of the outer series moderate, well developed laterally, 

 distinctly increasing in size anteriorly. Dorsal XVI-XVIII 

 11-14, the soft fin scaly at the base. Anal VI-VIII 9-11. 

 Pectoral extending to above the origin of anal. Caudal 

 rounded. 



The two species, from South America, are modified from 

 the type represented by C. facetum. 



6, Cichlosoma temporale. 



Hei-os temporalis, Giinth. Oat. Fi.sh. iv. p. 287 (1862). 



Acara {Heros) crassa, Steind. Sitzb. Ak. Wien, Ixxi. 1875, p. 88, pi. v. 



Heros Goeldii, Bi)uleug. Ann. & Mag. Nat. Ilist. xx. 1897, p. 298 • 



Goeldi, Boll. Mus. Para, ii. 1898, pi. 

 Cichhisonia temporale, Pellegr. M(5m. Soc. Zool. France, xvi. 1903 



p. 218 (1904). 



Depth of body about If (l|-2) in the length, length of 

 head 2^-3. Snout longer than postorbital part of head. 

 Diameter of eye 3^-3^ in the length of head, iuterorbital 

 width 21— 2_^. Depth of praorbital equal to diameter of eye. 

 Maxillary nearly extending to the vertical from anterior 

 margin of eye ; praemaxillary processes not extending to 

 above the eye; jaws equal anteriorly; fold of the lower lip 

 not continuous ; cheek with 4 or 5 series of scales ; 7 or 8 

 gill-rakers on the lower part of anterior arch. Scales 

 30-32 ^^p 2| between lateral line and base of anterior part 

 of soft dorsal. Dorsal XVI-XVII 11-12, commencing above 

 the opercular cleft, the spines slightly increasing in length to 

 the last, which is nearly ^ tlie length of head ; the soft fin 

 pointed, when laid back extending beyond tiie middle of 

 caudal. Anal VI-YII (VIII) 9 (10). Pectoral | the length 

 of head, extending to above the origin of anal. Ventral 

 extending to middle of anal or beyond. Caudal rounded. 

 Caudal peduncle \ as long as deep. Brownish, with 3 



