xvith a List of Reptiles found in Cambridgeshire. 377 



toes, of nearly equal length. The posterior, with five perfectly- 

 formed, a little webbed, and the rudiment of a sixth*: of these 

 the fifth is more than double the length of any of the others. 

 Extremities of all the toes black. 



The general colour of this animal varied in different indi- 

 viduals; — in some ai)proaching to yellow, — in others almost to 

 black. In such as were sickly, the black had a lurid dingy 

 appearance; — the colours lost their brightness, and the yellow 

 dorsal line became nearly obsolete. All the specimens which 

 have as yet fallen under my notice have been small and con- 

 siderably under size. Pennant states the following to be the 

 dimensions of this reptile. " Length of the body two inches and 

 a quarter; the breadth, one and a quarter: the length of the 

 fore legs one inch and one-sixth; of the hind legs, two inches." 



I shall conclude this paper with a brief enumeration of all 

 the .species belonging to this class of animals which I have 

 hitherto discovered in Cambridgeshire. 



ORDER I. Sauria. 



Genus I. LACERTA. Linn. 



Sp. 1. L. agilis, Flem. Brit. Anim. p. 150. 



Common Lizard. — A very variable species, of which hardly two 

 individuals are to be found, marked exactly in the same way. 

 It is common every where in dry sunny situations, throughout the 

 spring and summer months, and is in general first seen about 



* In the common Toad, the sixth toe on the posterior pair of feet is much more 

 developed than in the Natter-Jack. The toes are also more webbed. 



