CLEANLINESS. 



25 



from the skin, and, by a peculiar movement of 

 the retractile rays, is lodged in the funnel-shaped 

 pocket. 



Larva of the Glow-worm, using its cleaning instrument. 



" The actual food of the grub in question (as- 

 certained to be snails) shows, in a very striking point 

 of view, the design of Providence in furnishing it 

 with the instrument which I have described, for it 

 cannot well devour one of its victims without being 

 soiled by slime ; and accordingly, after every repast, 

 I observed that it went carefully over its head, neck, 

 and sides, with its cleaning instrument to free them 

 from slime *." 



We may also mention, in illustration, the pe- 



* J. Rennie, in the Journal of the Royal Institution for Oct. 

 1830. 



