ANNOTATED LIST OF THE SPECIES 397 
510. CicHLAURUS TEMPORALIS (Giinther) 
Heros temporalis Giinther, 1862, Cat. Fish. Brit. Mus., IV, 287. 
Cichlasoma temporale Pellegrin, 1903 (1904), Mém. Soc. Zool. France, XVI, 218; 
Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 473. 
Acara crassa Steindachner, 1882 (1883), Denksch. Kx. Akad. Wiss. Wien, XLVI, 2, Rio Huallaga. 
Cichlasoma coryphaenoides Haseman, 1911¢, Ann. Carnegie Mus., VII, 342. 
Amazons to Huallaga and Guiana 
511. CIcHLAURUS AUTOCHTHON (Giinther) 
Heros autochthon Giinther, 1862, Cat. Fish. Brit. Mus., IV, 299; 
Pellegrin, 1903 (1904), Mém. Soc. Zool. France, XVI, 235. 
Acara (Heros) autochthon Steindachner, 1874, Sitzb. KK. Akad. Wiss. Wien, LX X, 502, pl. 1; 
Cope, 1878, Proc. Amer. Phil. Soc., XVII, 695, R. Maranon. 
Cichlasoma autochthon Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 473. 
Cichlasoma facetum Haseman, 1911e, Ann. Carnegie Mus., VII, 340. 
La Plata basin, Brazilian coastal streams, Peru 
Cope appears to doubt the identity of his specimens with those from the coast. 
While Pellegrin’s H. autochthon material closely resembles C. facetus, he believes 
that it should be assigned to C. oblongus Castelnau, which also Haseman reduces to 
C’. facetus on the ground that the folding of the lips is a variable character. 
Genus 206: MESONAUTA Ginther 
Mesonauta Giinther, 1862, Cat. Fish. Brit. Mus., IV, 300; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 498. 
Cichlasoma (Mesonauta) Eigenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, III, 473. 
Astronotus (Mesonauta) Eigenmann and EKigenmann, 1891, Proc. U. 8. Nat. Mus., XIV, 69. 
Type: Heros insignis = Heros festivus Heckel 
Peruvian Amazon to Brazilian Amazon and the Guianas, Orinoco, Paraguay 
Separable most readily by its contours, compressed and increasing in width 
to the posterior half of the dorsal fin; scales of the lateral line not larger than those 
adjacent; lower lip with frenum; origin of the dorsal fin behind that of the ventral. 
512. Mrsonauta FESTIVUM (Heckel) 
Heros festivus Heckel, 1840, Ann. Wiener Mus., II, 376, R. Guaporé. 
Acara festiva Steindachner, 1875, Sitzb. KKK. Akad. Wiss. Wien, LX.XI, 98. 
Astronotus (Mesonauta) festivus Eigenmann and Higenmann, 1891, Proc. U.S. Nat. Mus., XIV, 69. 
Mesonauta festivus Eigenmann and Bray, 1894, Ann. N. Y. Acad. Sci., VII, 619; 
Eigenmann, 1912, Mem. Carnegie Mus., V, 498. 
Cichlasoma festivum Regan, 1905, Ann. Mag. Nat. Hist., (7), XVI, 69; 
Higenmann, 1910, Rept. Princeton Univ. Exped. Patagonia, IIT, 473; 
Haseman, 1911¢e, Ann. Carnegie Mus., VII, 340; 
Fowler, 1939 (1940), Proce. Acad. Nat. Sei. Phila., XCI, 280, one, 95 mm., Contamana. 
