Introduction. xli 



Poecilia occidentalis (Baird & Girard) : Tepic. 



Chirostoma jordani Woolman: Salamanca; Cuitzeo; Aguas Calientes; Lagos; 



Ocotlan; Acambaro; Huingo. 

 Chirostoma arge (Jordan & Snyder) : Aguas Calientes; Lagos. 

 Chirostoma bartoni Jordan & Evermann: Lerma; "near Guanajuato." 

 Chirostoma attenuatum Meek: Patzeuaro. 

 Chirostoma labarcae Meek: La Barca; La Palma. 

 Chirostoma patzeuaro Meek: Patzeuaro. 

 Chirostoma zirahuen Meek: Zirahuen. 

 Chirostoma humboldtianum (Cuvier & Valenciennes) : La Laguna; Lago de Juan- 



acatlan; Patzeuaro. 

 Chirostoma chapalae Jordan & Snyder: Chapala; Ocotlan; La Palma; "Estado 



de Jalisco." 

 Chirostoma grandocule Steindaehner: Patzeuaro; Ocotlan; La Palma. 

 Chirostoma promelas Jordan & Snyder: Chapala; Ocotlan; La Palma; "Estado 



de Jalisco." 

 Chirostoma sphyraena Boulenger; Chapala. 



Chirostoma lucius Boulenger: Chapala, Ocotlan; La Palma; La Barca. 

 Chirostoma lerma? Jordan & Snyder: Chapala; Ocotlan; La Palma. 

 Chirostoma ocotlanae Jordan & Snyder: Ocotlan; La Palma; "Estado de Jalisco." 

 Chirostoma estor Jordan: Patzeuaro; Chapala. 

 Agonostomus monticola (Bancroft); Rio Santiago. 

 Cichlasoma beani (Jordan) : Tepic. 



VALLEY OF MEXICO. 

 The Valley of Mexico was formerly a part of the Lerma drainage 

 system, though it has no natural outlet to the sea. The following 

 is a list of the fishes known to this valley. All of these species except 

 five* have been taken in the basin of the Lerma, and but one of these, 

 Aztecula vittata (Girard), in the basin of the Rio Balsas. 



Algansea tincella (Cuvier & Valenciennes) : Chalco; Texcoco; Viga Canal. 



*Aztecula vittata (Girard) : Chalco; Texcoco; Xochimilco; Viga Canal. 



*Evarra eigenmanni Woolman: Tlahuae; "Valley of Mexico." 



*Evarra tlahuacensis Meek: Tlahuae. 



*Zoogoneticus miniatus Meek: Chalco. 



*Girardinichthys innominatus Bleeker: Chalco; Texcoco; Xochimilco; Viga Canal. 



Skiffia variegata Meek : Chalco. 



Chirostoma jordani Woolman: Chalco; Texcoco; Xochimilco; Viga Canal. 



Chirostoma humboldtianum (Cuvier & Valenciennes): Chalco; Xochimilco; 



Viga Canal. 

 Chirostoma estor Jordan: Xochimilco. 



RIO SAN FRANCISCO SYSTEM. 

 At La Antigua and San Francisco the Rio San Francisco is a broad 

 stream with a gravelly or a sandy bottom; the former place is just 

 above tide-water. At San Francisco the stream is quite rapid. I 

 made a small collection of fishes at these two places, also one at Jalapa 

 and one at Xico. The stream at Jalapa is small, and from it were taken 

 only two species. 



