io 



power of raising and depressing them ; those on the first and 

 second pairs are the most noticeable. 



Found, though rarely, among lichens on trees, and occasionally 

 inside dwellinghouses at Bloxworth. It occurs more abundantly 

 (in the immaturo state) in autumn under stones noar Pennsyl- 

 vania Castle, Portland. It is not adult until tho spring. The 

 six large oval pearly oyos are a vory striking object through 

 even an ordinary magnifying glass. 



