70 



r 'f ' 



B) ''Jlii»'V' 



m^^i 



There are no less tbau nine genera cf birds whieli do not, or only 

 accidentnlly, ranj;e northward of this district. They are — 



FlotiiH. 

 Tantalus. 

 Platalea. 

 Elantts. 

 Ictinia. 

 ' Conurus. 

 Chamaepelia. 

 Campcphihis. 

 Echnithcru8. 



All these genera, excepting the last, range into South America or 

 farther. 



Among mammals, but lew species and one genus {SUjmodon) are 

 confined to it. Lepiis aquaticus and L. palustris, the cotton-rat, the 

 Florida Ncotoma, etc., and a few others, are restricted by it. The fish- 

 fauna is very similar to that of the Eastern region, under which it 

 will be considered. 



The Eastern region differs from the Austroripariau almost entirely 

 in what it lacks, and agrees with it in all those peculiarities hy which it 

 is so widely separated from the Central region. 'So genus of mam- 

 mals is found in it which does not range into the Central or other 

 region, excepting Condyhira (star-nosed mole) ; but numerous species 

 are confined to it, not extending into the Austroriparian. These number 

 from twenty to twenty-five. Among birds, the following genera are shared 

 with the more southern region only: Quiscaliis, Seiurus, Oporornis, 

 HelmitlwruSj Protonotaria, Parula, Mniotilta, Ortyx. No genus of Eep- 

 tiles, and but one of Batrachians {Gyrinophilus), is confined to this 

 region ; but it shares all it possesses with the Austroriparian. It 

 has but three genera of lizards, viz, Cnemidophorus, Eumeces, and Seek- 

 porus, which are universallj' Nearctic. The Batrachian genera not found 



in the Central are — 



iScaphiopus. 



Gyrino2)h'duN. 

 i^pelerpes. 

 Plethodon. 

 Ucmidactylium. 

 Dcsmatognathns. 

 < Menopoma. 



INccturus. 



