NATTER-JACK. 207 



species is its mode of progression. Unlike the frog, 

 which advances by regular leaps ; and the toad, whose 

 pace is seldom exerted beyond that of a slow crawl, 

 the natter-jack has a kind of shuffling run, which 

 is seen to most advantage when it is following its 

 prey, and by which means it is enabled, when in 

 full health and activity, to get over its ground with 

 considerable quickness.* 



* A yet more interesting addition than the natter-jack to the 

 reptiles of Cambridgeshire has been made lately in the instance 

 of the edible frog (Rana esculenta, Linn.), which has been met 

 with in Foulmire Fen, in some abundance. See The Zoologist, pp. 

 393, 467, 677, and 727, for different notices relating to this new 

 and important discovery. 



