170 



PROCEEDINGS OF THE NATIONAL MUSEUM 



CRENICICHLA LUGUBRIS Heckel 



Crenidchla luguhris Heckel, Ann. Wien. Mus. Naturg., vol, 2, p. 422, 1840 

 (Rio Negro). — Regan, Proc. Zool. Soc. London, 1905, pt. 1, p. 165 (Brazil; 

 Guiana; Venezuela). 



Genus ACARONIA Myers 



Acaronia Myers, Stanford Ichthyol. Bull., vol. 1, No. 5, p. 170, 1940 (replaces 

 Acaropsis Steindachner, preoccupied). (Genotype, Acara nassa Heckel.) 



Acaropsis Steindachner, Sitzb. Akad. Wiss. Wien, vol. 71, p. 99, 1875. (Geno- 

 type, A. nassa Heckel.) 



ACARONIA NASSA (Heckel) 



Acara nassa Heckel, Ann. Wien. Mus. Naturg., vol. 2, p. 353, 1840 (Rio Guapor6). 

 Acaronia nassa Eigenmann and Allen, Fishes of western South America, p. 

 388, 1942 (Orinoco). 



Genus NANNACARA Regan 



Nannacara Regan, Ann. Mag. Nat. Hist., ser. 7, vol. 15, p. 344, 1905. (Geno- 

 type, Nannacara anomala Regan.) 



NANNACARA ANOMALA Regan 



Nannacara anomala Regan, Ann. Mag. Nat. Hist., ser. 7, vol. 15, p. 344, 1905 

 (Rio Essequibo). 



Three specimens, 27 to 31 mm. in standard length, from Caripito, William 

 Beebe, 1942. 



Table 19. — Counts of fin rays made on Nannacara anomala Regan 



Genus AEQUIDENS Eigenmann and Bray 22 



Aequidens Eigenmann and Brat, Ann. New York Acad. Sci., vol, 7, p. 616, 1894. 

 (Genotype, Acara tetramerus Heckel.) 



KEY TO THE SPECIES OF AEQUIDENS REPORTED OR EXPECTED TO OCCUR IN 



VENEZUELA 



la. Two or 2^ scales between base of first soft ray of dorsal fin and lateral line; 



the blackish lateral streak or band, if present, extending from eye through 



black lateral blotch to upper half of base of caudal fin rays; gill rakers 2 or 



3 + 5 or 6 on first arch. 



2a. Base of caudal fin rays with a prominent black spot, about one-half size of 



eye, located entirely above midaxis of caudal fin or lateral line if it 



extends on base of fin. 



" As here understood, Acara Heckel, 1840, with its t3rpe restricted by Gill to Acara crassispinis Heckcl= 

 Lobotes oceltatus Agassiz, is a synonym of Astronotus Swainson, 1839, with its type, Lobotes ocellatus Agassiz, 

 the only species mentioned. Thus, in Regan's revision of the South American cichlid genera, his use of 

 Acara is a synonym of Aequidens. 



