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: Patzcuaro. 

 Chirostoma labarcae Meek: La Barca; La Palma. 

 Chirostoma patzcuaro Meek: Patzcuaro. 

 Chirostoma zirahuen Meek: Zirahuen. 

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



acatlan; Patzcuaro. 

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



de Jalisco." 



Chirostoma grandocule Steindachner: Patzcuaro; 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 lermae Jordan & Snyder: Chapala; Ocotlan; La Palma. 

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

 Chirostoma estor Jordan: Patzcuaro; 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 t 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: Tlahuac; "Valley of Mexico." 



*Evarra tlahuacensis Meek: Tlahuac. 



*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. .. 



