1 6 palmer: 



Rana virescens, Kalm. Leopard Frog 

 " paliistris, L,e Conte. Pickerel Frog 

 " sylvatica, L,e Conte. Wood Frog 



Hyla versicolor, Le Conte. Tree Toad 



" pickerhigii, Holbrook. Pickering's Frog 

 " ayidersonii, Baird. Anderson's Frog 



Chorophihis triseriatus . Swamp Tree Frog 



Aais crepitans, Baird. Cricket Frog 



The Bull Frog, {Rana catesbiana, Shaw). 



" The largest of the frogs; in ponds and sluggish rivers, 

 from Kansas east; remarkable for its sonorous bass notes." 

 So Jordan ends a technical description of this species. 



This frog is easily distinguishable from all others as 

 follows: — It is more or less green above, with few spots or 

 none on the back, and without the two folds parallel to the 

 spine, which are so conspicuous in all the other common frogs. 

 Without further description we turn our attention upon a 

 specimen. This individual was an inhabitant of a pond near 

 Ridley Park. It is nearly as large as any frog one is likely 

 to meet in this vicinity, and its feet are comparable in size to 

 those of a young duck. In the same pond were seen six 

 others, all ecjually large, and probably all of the same hatch- 

 ing. This family of batrachians habitually sat around the 

 edges of the water, at nearly regular intervals, submerged to 

 the throat. Of an evening one saw of them only a few yel- 

 lowish spots — the throats, in fact, which showed in the twi- 

 light in marked contrast with the dark, smooth surface of the 

 water. The booming at night was something to remark. 

 The tumult went on all the evening ; it was still going at 

 midnight, and it died away only in the gray ()t the morning. 

 This pond was of no great depth or extent, and many 

 attempts were made to capture one of the frogs alive. But 

 this was found to be a difficult matter. When approached, 

 no matter with what precatitions, all disappeared effectually. 

 There was S(miething a trifle mvsterious about this vanishino. 



