xlii Field Columbian Museum — Zoology, Vol. V. 



At Xico there is a waterfall of 260 feet, which is used for power 

 to generate electricity for lighting several cities in this region. I 

 found but one species of fish above these falls. The streams at Perote 

 and at Tezuitlan contain no fishes, and it is probable that none are 

 found in this region at a greater altitude than Xico, or not exceeding 

 6,000 feet. 



The following is a list of species known from the Rio San Fran- 

 cisco and its tributaries: 



Dorosoma exile Jordan & Gilbert: La Antigua. 



Pseudoxiphophorus bimaculatus (Heckel) : Jalapa; Xico. 



Poecilia sphenops Cuvier & Valenciennes: La Antigua. 



Xiphophorus jalapae Meek: Jalapa. 



Tylosurus marinus (Walbaum) : San Francisco. 



Centropomus mexicanus Bocourt: San Francisco. 



Cichlasoma parma (Giinther) : La Antigua; San Francisco. 



Philypnus dormitor (Lacepede) : San Francisco; La Antigua. 



Gobius parvus Meek: La Antigua. 



Gobius claytoni Meek: La Antigua; San Francisco. 



Chonophorus taiasica (Lichtenstein) : La Antigua; San Francisco. 



LAS LAGUNAS, NEAR VERA CRUZ. 

 Near the city of Vera Cruz are a large number of sand dunes, 

 among which are ponds, swamps, and small lakes (Las Lagunas) con- 

 taining fresh water. These usually have an outlet to the sea. One 

 of these, about two miles north of the city, was visited, and from it 

 the following species of fishes, except one,* were taken: 



*Symbranchus marmoratus Bloch: Vera Cruz. 

 Poecilia sphenops Cuvier & Valenciennes: Vera Cruz. 

 Agonostomus monticola (Bancroft): Vera Cruz. 

 Cichlasoma hedricki Meek: Vera Cruz. 

 Cichlasoma parma (Giinther) : Vera Cruz. 

 Cichlasoma melanurum (Giinther): Vera Cruz. 

 Dormitator maculatus (Bloch) : Vera Cruz. 

 Eleotris pisonis (Gmelin) : Vera Cruz. 

 Gobius parvus Meek: Vera Cruz. 

 Gobius claytoni Meek: Vera Cruz. 



BOCA DEL RIO SYSTEM. 



The river at Boca del Rio is broad and its water brackish. A 

 short distance above the city it is quite fresh, but the fishes are mostly 

 salt-water forms. 



Below is given a list of the species taken which I have included 

 as fresh-water fishes: 



Paragambusia nicaraguensis (Giinther) : Boca del Rio. 

 Belonesox belizanus Kner: Boca del Rio. 

 Poecilia sphenops Cuvier & Valenciennes: Boca del Rio. 

 Siphostoma brevicaudum Meek: Boca del Rio. 



