26 Fro^s 0/ </?e Okefinokee Swamp 



Table i i 



Bujo quercicus 

 Pseudacris ocularis 

 Acris gryllus 

 Pseudacris nigrita 

 Gastrophryne carolinensis 

 Hyla Jemoralis 

 Hyla andersonii 

 Rana virgatipes 

 Hyla squirella 

 Hyla cinerea 

 Rana sphenocephala 

 Scaphiopus holhrookii 

 Hyla versicolor 

 Hyla gratiosa 

 Rana aesopus 

 Rana clamitans 

 Rana septentrionalis 

 Bujo terrestris 

 Rayia grylio 

 Rana catesheiana 



VOICE 



The species of Bufo, Hyla, Acris, Pseudacris, Scaphiopus have single 

 vocal vesicles beneath the chin. The frogs go from single mental vocal 

 inflation of Rana clamitans, R. heckscheri, R. catesheiana, R. grylio, R. septen- 

 trionalis (slightly lateral as well), to round paired sacs of Rana virgatipes, 

 elongate lateral sacs of Rana sphenocephala, to the side of body inflated as in 

 Rana aesopus. 



We will not attempt a general discussion of voice. It is a hard topic to 

 characterize and the process of voice production in detail is a subject we plan 

 to pursue at greater length in subsequent investigations. 



MATING 



Every species (/?. heckscheri and P. nigrita not studied) in Okefinokee 

 swamp doubtless mates or breeds more at night than by day, but inasmuch 

 as heavy rains are most responsible for onset of breeding many of them may 

 mate vigorously by day. Those we have thus found are : Scaphiopus holhrookii, 

 Bufo quercicus, Bujo terrestris, Acris gryllus, Hyla femoralis, Hyla gratiosa, 

 Rana aesopus, Rana clamitans, Rana sphenocephala. 



The mating eagerness, or ardor has been much discussed as to the mutila- 

 tion which males will endure when the clasping impulse is paramount. This 

 we will not discuss in this paper. It is hard to measure which are the more 

 tenacious — toads, frogs, treefrogs or narrow-mouthed frogs. All are examples 

 of intense amplexation. 



At this point I wish to observe that contrary to some statements that the 

 extrusion of eggs usually occurs only after the male has clasped the female 

 for several days, in the species of the United States this seldom obtains. We 



