166 PROCEEDINGS OF THE NATIONAL MUSEUM vol. 99 



dorsal rays XIII or XIV, 9 to 11; anal rays III, 8 or 9; upper 

 lateral line posteriorly with one-half scale between it and base 



of dorsal fin Acaronia Myers 



66. Rear end of maxillary not exposed. 



7a. Upper lateral line separated from dorsal fin base by one-half a 

 scale for part of its length posteriorly; preopercle scaled; 

 dorsal rays XVI or XVII, 7 or 8; anal rays III or IV, 7 or 8; 

 scales about 23 or 24; body somewhat elongate, compressed. 



Nannacara Regan 

 76. Upper lateral line one or more scale rows from dorsal fin base 

 even at its posterior end; preopercle naked; body compressed; 

 dorsal rays XIII to XVI, 7 to 12; anal III, 6 to 11. 



Aequidens Eigenmann and Bray 



56. Anal spines IV to VII or if IV spines the lateral Mne is separated 



from the dorsal fin base by more than one row of scales; preopercle 



naked; teeth conical; inner ones smallest. 



8a. Posterior ascending process of premaxillaries as long as head or 



extending as far as opposite rear of orbits, much past beginning 



of scaled area between orbits; lower jaw longest; the rear of 



maxillary much exposed and projecting beyond preorbital 



sheath; body compressed; dorsal rays XV or XVI (rarely XVII). 



10 to 13; anal rays V to VI (rarely VII), 8 to 10; gill rakers 



about 8 to 11 on lower part of first arch; pores in lateral line 



about 20 or 21-1-9 to 11 Petenia Giinther 



86. Premaxillary process not extending past middle of interorbital 

 space, and much shorter than head; dorsal rays XIV to XIX, 

 7 to 15; anal rays IV to XII, 6 to 14; base of soft rays of median 

 fins usually with a few rows of scales Cichlasoraa Swainson 



Genus CICHLA Bloch and Schneider 



Cichla Bloch and Schneider, Systema ichthologiae, p. 336, 1801. (Restricted to 

 Cichla ocellaris Bloch and Schneider by Heckel, Ann. Wien. Mus. Naturg., 

 vol. 2, p. 308, 1840. Genotype designated by Eigenmann, Mem. Carnegie 

 Mus., vol. 5, p. 509, 1912, as Cichla ocellaris Bloch and Schneider.) 



CICHLA OCELLARIS Bloch and Schneider 



Pav6n 



Cichla ocellaris Bloch and Schneider, Systema ichthyologiae, p. 340, 1801. 



Crenicichla orinocensis [Humboldt] GtJNTHER, Catalogue of the fishes in the 

 British Museum, vol. 4, p. 309, 1862 (Rio Negro; Orinoco). — Eigenmann 

 and Eigenmann, Proc. U. S. Nat. Mus., vol. 14, p. 70, 1891 (Orinoco). — 

 Rohl, Fauna descriptiva de Venezuela, p. 384, 1942 (Orinoco; Rio Negro). 



Cichla temensis Eigenmann and Allen, Fishes of western South America, p. 403, 

 1942 (Orinoco). 



Genus PTEROPHYLLUM Heckel 



Pterophyllum Heckel, Ann. Wien. Mus. Naturg., vol. 2, p. 334, 1840. (Geno- 

 type, Pterophyllum scalaris Heckel — Platax scalaris Cuvier and Valenciennes.) 



KEY TO THE SPECIES OF PTEROPHYLLUM REPORTED FROM VENEZUELA 



la. Scale rows 33 to 38 on side of body from head to base of caudal fin; gill rakers 

 12 to 14 on lower part of first arch* lateral line pores 17 to 19-f9 to 11; 



