157 



The shield is wrinkled concentrically, is rounded be- 

 hind, and large, occupying nearly a half of the length of 

 the animal. When the slug is resting the shield be- 

 comes a prominent object owing to its being considera- 

 bly elevated. The back of the animal [except near the 

 tail] is circular, about the tail it is keeled, and ends in 



an acute point. Sometimes when crawling it will curl 

 up the extremity of the tail. The mucus is transparent 



and copious. The animal is slender, being narrow for 

 its length. Tentacles long and transparent, The^hell 



is oval and thick. Sole of the foot reddish-grey. Length 



when crawling barely half an inch. It has the power 



of suspending itself by a mucous thread. 



Chiefly procured, according to Mr. Alder, in damp 



woods; in this locality it is found under stones, and at 



the roots of the sedge-grass, close to the water's edge. 

 M. Chautereaux says it lays from twelve to eighteen 



transparent and colourless eggs, in from six to eight 



days. The young become fully grown in seventy days. 

 It is a very active species, crawling about rapidly. It 



must be considered one of our rarer slugs. 

 la this neighbourhood it is found by the edge of the 



lake at Highfield-house, but not very abundantly. 



The more distant localities are: in theN.E. of England 



[ Alder], and in the Isle of Skye [Thompson.] 



LiMAX Arborum [continued from page 54.] 



In rainy weather the apple trees at Highfield-house 

 are covered with this slug from the bole to a considera- 

 ble height. It is also common on the bridge over the 

 brook at the base of the Beeston-hill. I have found it 

 plentifully on the alder-trees at Cbaigeley, in Lanca- 

 shire, and Mr. Bridgeman has noticed it at Norwich, 

 p 



