On the American Cichltd Genus Cichlosoma, &c. 4:53 



L. — A Revision of the Fishes of the American Cichlid Genus 

 Cichlosoma and of the Allied Genera. By C. Tate 

 Regan, B.A. 



[Concluded iVi)in p. 340.] 



Petenia. 



Fetenia, Giintli. Cat. Fi«h. iv. p. 391 (1802). 



Feteiiid (part.), Eigenm. & Bray, Ann. Ac. N. York, vii. 1894, p. 614 ; 

 Pelle-r. M6m. Soc. Zool. France, xvi. 1903, p. 243 (1904). 



Body moderately elongate, compressed ; scales rather large, 

 ctenoid. Two lateral lines. Jaws with bands of small 

 conical teeth, the outer series enlarged; canines moderate. 

 Month large ; prasmuxillaries very protractile, their processes 

 as long as the head ; maxillary considerably exposed ; lower 

 jaw strongly projecting. Upper surface of the h^ad to the 

 level of the orbits, cheeks, and opercular bones scaly ; prae- 

 operculum narrow, entire, without distinct lower limb. Gill, 

 rakers rather short and few. A single dorsal, with X V-XVI 

 12-13 rays ; anal with V 8-10 rays. Pectoral asymmetrical, 

 with li rays; ventrals below the base of the pectoral. 

 Caudal rounded. 



A single species from Lake Peten, Guatemala, to be 

 regarded as a specialized form derived from a type similar to 

 Cichlosoma Dovii. 



Petenia splendid a. 



Petenia sjyletidida, Guntli. Cat. Fish. iv. p. 301 (1862), and Trans. Zool. 

 Soc. vi. 1869, p. 469, pi. Ixxix. tig. 2 ; Steind. Denksehr. Ak. Wien, 

 xxiii. 1864, p. 73, pi. iv. iigs. 3 & 4 ; Kigeum. & Brav, Ann. Ac. 

 N. York, vii. 1894, p. 615; Jord. & Everm. Bull. U.S. Nat. Mus. 

 xlvii. 1898, p. 1513 ; Everm. & Goldsb. Bull. U.S. Fish. Comm. xxi. 

 1902, p. 155, %. ; Pellegr. Mem. Soc. Zool. France, xvi. 1903, p. 243 

 (1904). 



Depth of body about 3 in the length, length of head 2g-2|. 

 Snout a little shorter than postorbital j)art of head. Dia- 

 meter of eye 5-6 in the length of head and 1-1^ in the 

 interorbital width ; depth of prseorbital g-| the diameter of 

 eye. Lower jaw strongly projecting ; maxillary extending 

 to below middle of eye or beyond ; praemaxillary processes 

 extending nearly to origin of dorsal. Cheek with 7-10 

 series of scales; 10 or 11 gill-rakers on the lower part of 

 anterior arch. Scales of the lateral line a little larger than 

 the others; scales above the lateral line a little smaller 

 than those below it, about 45 in a longitudinal series above, 



Ann. & Mag. N. IlisL Ser. 7. Vol. xvi. 29 



