OBSERVATIONS ON 



is, to kill as many as possible before they 

 begin to breed. 



Large, grey, shell-less, cellar snails lay 

 themselves up about the same time with 

 those that live abroad ; hence it is plain 

 that a defect of warmth is not the only 

 cause that influences their retreat. 



WHITE. 



SNAKES SLOUGH. 



There the snake throws her enamell'd skin. 



Shakespeare, Mids. Night's Dream. 



About the middle of this month (Sep- 

 tember) we found in a field near a hedge 

 the slough of a large snake, which seemed 

 to have been newly cast. From circum- 

 stances it appeared as if turned wrong side 

 outward, and as drawn off backward, like 

 a stocking or woman's glove. Not only the 

 whole skin, but scales from the very eyes, 

 are peeled off, and appear in the head of 

 the slough like a pair of spectacles. The 

 reptile, at the time of changing his coat, 



