Introduction. xliii 



Centropomus mexicanus Bocourt: Boca del Rio. 

 Cichlasoma parma (Gunther) : Boca del Rio. 

 Philypnus dormitor (Lacepede) : Boca del Rio. 

 Dormitator maculatus (Bloch) : Boca del Rio. 

 Eleotris pisonis (Gmelin) : Boca del Rio. 

 Gobius parvus Meek: Boca del Rio. 

 Gobius claytoni Meek: Boca del Rio. 



RIO BLANCO SYSTEM. 

 The Rio Blanco rises at the foot "of Mt. Orizaba and flows into the 

 Gulf about thirty miles south of Vera Cruz. I visited this river at Rio 

 Blanco and one of its tributaries at Cordoba. The upper part of its 

 course is a mountain torrent. The tributary at Cordoba was nearly 

 dry, the water being confined to holes among the huge boulders along 

 its bed. This stream becomes a mountain torrent in the rainy season. 

 At Rio Blanco the banks were so steep and although the current is 

 sluggish, it was impossible to use a seine here with any success. The 

 fish fauna of this river is certainly much greater than the present 

 list would indicate. 



Amiurus australis Meek: Rio Blanco. 

 Rhamdia oaxacae Meek: Rio Blanco; Cordoba. 

 Rhamdia brachyptera (Cope) : Orizaba. 

 Tetragonopterus aeneus Gunther: Cordoba. 

 Pseudoxiphophorus bimaculatus (Heckel) : Orizaba; Cordoba. 

 Gambusia gracilis (Heckel) : Orizaba. 

 Xiphophorus helleri Heckel: Cordoba. 

 Chonophorus taiasica (Lichtenstein) : Orizaba. 



RIO OTOPA SYSTEM. 



The River Otopa is a small stream about 35 miles south of Vera 

 Cruz. When visited the water was very low, and the river consisted 

 of a few deep holes with very little running water between them. 

 The bottom was sandy. At Otopa the railroad bridge is a single span 

 of about 75 feet. 



The following fishes were taken at this place: 



Ichthyaelurus meridionalis (Gunther) : Otopa. 

 Rhamdia oaxacae Meek: Otopa. 

 Tetragonopterus aeneus Gunther: Otopa. 

 JDorosoma anale Meek: Otopa. , 

 Pseudoxiphophorus bimaculatus (Heckel) : Otopa. 

 Paragambusia nicaraguensis (Gunther) : Otopa. 

 Belonesox belizanus Kner: Otopa. 

 Heterandria lutzi Meek: Otopa. 

 Pcecilia sphenops Cuvier & Valenciennes: Otopa. 

 Xiphophorus helleri Heckel: Otopa. 

 Agonostomus monticola (Bancroft): Otopa. 

 Cichlasoma melanurum (Gunther) : Otopa. 

 Thorichthys helleri (Steindachner) : Otopa. 



