392 BULLETIN OF THE 



on the coast, differs quite sensibly in its general faunal and floral 

 characteristics from that part of the State situated farther to the north- 

 ward, its fauna, especially the ornithological portion, having a decidedly 

 West Indian or tropical aspect, as has also its flora. Dr. Stimpson has 

 recently shown that on the Gulf coast of the State the southern forms, 

 among the marine animals, extend considerably farther north than they 

 do on the Atlantic coast; * but whether the warm waters of the Gulf 

 of Mexico sensibly modify the land fauna of the northern coast of 

 the Gulf sufficiently to atfect the distribution of the birds is a point I 

 have been as yet unable to determine. As it seems probable, however, 

 that it does not to any great degree, the Floridian Fauna may accord- 

 ingly be provisionally regarded as terminating near the latitude of 

 Lake George. 



The peculiarities of the bird fauna of Southern Florida in summer is 

 still too imperfectly known to admit of the Floridian ornithological fauna 

 being fully characterized. The occurrence within it of the following 

 species which do not appear to extend much, if any, to the north 

 of it, may serve for the present to distinguish this fauna from the 

 Louisianian. 



Species limited in their Northward Range by the Floridian Fauna. 



1. Vireosylvia barbatula. 12. Starnaenus cyanocephalus. 



2. Certhiola flaveola. 13. Rostrhamus sociabilis. 



3. Icterus vulgaris. 14. Polyborus tharus. 



4. Cyanocitta floridana. 15. Aramus giganteus. 



5. Tyrannus dominiccnsis. 16. Demiegretta Pealei. 



6. Coccygus minor. 17. Demiegretta rufa. 



7. Crotophaga ani. 18. Audubonia occidentalis. 



8. " Crotophaga rugirostris." 19. Ibis rubra. 



9. Columba leucocephala. 20. Phoenicopterus ruber. 



10. Zenaeda amabilis. 21. Ilaliplana fuHginosa. 



11. Oreopelia martinica. 22. Anoiis stolidus. 



II. Louisianian Fauna. The Louisianian Fauna may be pro- 

 visionally considered as limited at the northward by the isothcral line 

 of 77° F., it embracing all thpt part of the United States south of this 

 line east of the Great Plains, except the Floridian Fauna. Beginning 

 on the Atlantic coast apparently as far north as Norfolk, Virginia, it oc- 



• See American Naturalist, Vol. IV, p. 636, December, 1870. 



