CATALOGUE OF VERTEBRATES. 649 



CLASS AIYTF^HIBIA. 



(Batrachia.) 

 Batrachians. 



These were, of old, classed with the reptiles, but are now seen to 

 be more closely allied to the fishes, constituting the group Ichthyop- 

 sida, while the true Reptilia are included with the birds (Aves) in 

 the group Sauropsida. 



ORDER ANURA. 



Family RANID^E. 



Frogs. 



RANA, L. 



R. virescens, Kalm (halecina Abbott's Catalogue.) Leopard Frog. 

 Shad Frog. Common Frog. 



General color greenish, sometimes brassy, with many pale- 

 edged dark spots in two irregular rows on the back ; usually 

 two large spots between the eyes ; legs barred above ; belly 

 pearly or yellowish ; each side of back with a well-marked fold. 



" Very abundant. Found in greater numbers along the banks 

 of the larger streams than in the swamps and meadow lands." 



R. palustris, Le C. Pickerel Frog. 



Brownish, with square spots in four rows; young golden 

 green ; two glandular folds on each side. 



" Numerous. This species is among the first to give notice of 

 the approach of spring, by its monotonous ' singing.' " 



R. clamata, Daud. (fontinalis, Le C.) Green Frog. Spring Frog. 



Bright green, darker on flanks ; everywhere spotted with small 

 dots ; white below. 



" The most common species of the small frogs. The common 

 name is aptly chosen, as it is essentially a clear-water, spring- 

 loving creature. 



"jR. horioonensis, Holbr. 



