DE. GUNTHEE OlST THE FISHES OF CBNTEAL AMEEICA. 



403 



Xiphophorus with one, Mollienesia with one, Pcecilia with eight, and Belonesox with 

 one species. 



The affinity of this freshwater fauna with that of Mexico, will be found to be greater 

 than with that of any other country (I might mention about ten species common to 

 Guatemala and Mexico) ; but until we are better acquainted with the habitats of species 

 described as Mexican, a more detailed comparison of the two countries would be of but 

 little advantage. The freshwater fish-fauna of Central America may be shortly thus 

 characterized: — A part of the Chromides (Heros, &c.) and the Cyprinodontes generally 

 have attained to their greatest development; neotropical types extending northwards 

 prevail over nearctic extending southwards, the latter being represented by a few extreme 

 branches. 



§ 8. An Attempt to Subdivide this Fauna into Provinces. 

 We may subdivide this part of the freshwater fauna into the following provinces : — 

 A. The fresh waters north of the Lakes of Managua and Nigaragua, emptying into the 



Pacific. — To this province belong the fishes collected at Chiapam [Ch.], Huamuchal [H.], 



San Jose [J.], m the Rio Guacalate (Dueiias) [G.], San Salvador [S.], and Libertad [L.] ; 



also the fishes from the Lakes of Amatitlan [Am.] and Atitlan [At.] may be referred to 



the same province. 



[The species printed in italics in the following lists are found also in one or more 



other provinces, and in Atlantic rivers. 1 



Heros macracanthus 



trimaculatus 



nigrofasciatus . 



guttulatus . 



Agonostoma microps 

 Ai'ius guatemalensis . 



platypogon . 



• caerulescens . 



Pimelodus guatemalensis 

 Anacyrtus guatemalensis 

 Tetragonopt. microphtlialinus 



humilis . . . 



Fundulus guatemalensis 



paehycephalus . 



punctatus 



Anableps dovii . 

 Pcecilia meieicana 



thermalis . 



clo\ii . 



Girardinus pleurospUus 

 Clupea libertatis . . 

 Lejjidosteus tropicus . 



Ch. 

 Ch. 



Ch. 



H. 

 H. 



— — — Am. At. 



— — — Am. — 



— G. — — — 



J. 



H. 

 H. 

 H. 



G. 



— Am. 



— Am. 



— Am. 



At. 



Ch. 

 Ch. 

 Ch. 



H. — G. — Am. — 



— — — — Am. — 



H. 



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