466 



PATAGONIAN EXPEDITIONS! ZOOLOGY. 



2. Atherinopsis bonariensis (Cuvier & Val- 

 enciennes), 



Evermann & Kendall, 1906, 95. 

 Habitat : Lakes of Argentina. 



Family POLYCENTRID^. 



POLYCENTRUS Miiller & Troschel. 



Type : Polycentrus schomburgkii Miil- 

 ler & Troschel. 

 Range : Guiana and Trinidad. 

 Polycentrus schomburgkii Miiller & Tro- 

 schel, Gunther, III, 370. 



Habitat: Essequibo; Orinoco; Trini- 

 dad. 

 Polycentrus tricolor Gill, 



Gunther, I II, 3 70. 



Ai 



Habitat :Trinidad. 



MONOCIRRHUS Heckel. 



Type : Monocirrhus poly acanthus 



Heckel. 



Range that of the single species. 

 Monocirrhus polyacanthus Heckel, 



Gunther, III, 371. 

 Habitat: Rio Cupai and ponds near the 



Rio Negro. 



Family CENTROPOMID^. 

 CENTROPOMUS Lacepede. Habitat: Atlantic coast, entering rivers. 



A . 



O x ylabr ax Bleeker ; Macrocephalus 



Brown. 



Type : Scicena undecimalis Bloch. 

 Range : Marine. Some, possibly all, of 

 the species entering or living in 

 fresh water. 

 Ai. Centropomus medius Gunther, 



J. & E., 1119. 

 C. grandoculatus E. & J. ; C. pedimac- 



ula part J. & E. 

 Habitat: Atlantic and Pacific coasts, 



entering rivers. 

 A.2. Centropomus parallelus Poey, 



" J. & E., 1 122. 

 C. gabbi and heringi Fowler; C. mexi- 



canus Bocourt. 

 Habitat: Cuba to Bahia; Pacific coast, 



entering rivers. 

 3. Centropomus undecimalis (Bloch), 



J. & E., 1118. 



C. undecimradiatus, boubina and aureo- 

 viridis Lacepede; C. argenteus Re- 

 gan; C. appendiculatus Poey. 



A4. Centropomus pectinatus Poey, 



J. & E., 1 122. 

 C. pedimacula Poey. 

 Habitat: Cuba to Pernambuco, enter- 

 ing rivers. 



5. Centropomus nigrescens Gunther, 



Regan, 50. 

 Habitat : Rio Presidio to Panama. 



6. Centropomus robalito Jordan & Gilbert, 



J. &E., 1123. 



C. armatus Gunther, non Gill. 

 Habitat : Pacific coast from Mazatlan to 

 Panama, entering rivers. 



7. Centropomus armatus Gill, 



Regan, 1903, 627. 



C. atridorsalis Regan; C. brevis Gun- 

 ther. 



Habitat: Rio Vaqueria near La Tola, 

 northwestern Ecuador. 



8. Centropomus ensiferus Poey, 



Regan, 1906^, 391. 

 C. affinis Steind. ; C. scaber Bocourt. 

 Habitat: Guiana. 



