436 



ARTEROPODA. 



body with heavy armor; hirva leaf-like and transparent 'glass crabs,' 

 called Phyllosomae (fig. 442). PaUnurus* spiny lobster. PAGURIDEA, 

 hermit crabs; abdomen reduced, soft-skinned, and hidden for protection 

 in a snail shell which the animal carries about, which habit has resulted 



Fig. 446.— .4, Platyonichus oceUatHs* Lady crah ; B, Libiniii cmnrcrinatn,* spider crali 



(From Emerton.) 



in a spiral twisting of the abdomen. Some hermits (Eiipivyiinis) carry 

 S(!a anemones or hydroids on Ihoir shell, cases of symliiosis (p. 170). 

 Eupagurus* Clibaiiarhis* Allied is Birgus, the palm crab of the East 



