34 



Frogs of the Okefinokee Swamp 



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Figure I. Individual Eggs. X 2.3 



Bufo americanus 

 Bufo terrestris 

 Bufo fowleri 

 Bufo quericus 

 Scaphiopus holbrookii 

 Pseudacris ocularis 

 Pseudacris triseriata 

 (From Buffalo, N. Y.) 



9- 

 10. 



12. 

 13- 

 14. 



15- 

 16. 



Hyla crucifer 

 Acris gryllus 

 Hyla squirella 

 Hyla gratiosa 

 Hyla cinerea 

 Rana catesbeiana 

 Rana virgatipes 

 Rana grylio 

 Rana clamitans 



Hyla femoralis 

 Hyla versicolor 

 Rana palustris 

 Rana pipiens 

 Rana sphenocephala 

 Rana aesopus 

 Rana sylvatica 

 Gastrophryne carolinensis 



In No. 15 the vitellus was inadvertently drawn too large. 



trophryne carolinensis, although it lays at the surface, has the most beautifully 

 distinct, firm eggs of all the species considered. 



The difference in jelly consistency in an early spring laid egg and late 

 summer laid egg of the same species has not been studied for differences. 

 Nor have we fully determined whether heavier rainfall is needed for the tardy 

 breeders than for the early ones of a species. The eggs of Rana heckscheri, 

 and Pseudacris 7iigrita of the Okefinokee forms remain yet to be described 

 by someone. 



The eggs were laid in camp and in the laboratory by mated pairs caught 

 in the field. Later the eggs in the field were determined by these original 

 checks. Occasionally the process of egg laying was observed in the field. 

 Two species, one of the north and one of the south, were identified by the 

 positive elimination of all the other resident forms. 



