;54 



STALK-EYED CRUSTACEA 



Abdomen generally asymmetrical, the number of 

 appendages variable. 



Section A. Lithodea. 

 Section B. Pagurodea. 



Synopsis of the Sections. 



A. Carapace broadly ovate, uneven ; 

 rostrum prominent. 



a. First four pairs of legs well developed,, 

 cylindrical or subcylindrical ; last pair 

 chelate, slender, folded in either branchial 

 chamber. 



rt^. Abdomen bent under thorax. Ster- 

 num broad. — (Lit/iodm.) 



B. Carapace elongate, more or less 

 membranous. 



d. First three pairs of legs well 

 developed ; two last pairs of small size, 

 one or both chelate. 



d'^. Abdomen spirally twisted or 

 extended, usually membranous. Ster- 

 num linear. — {Pagiirodea^ 



Liihodea. 



Section A. Lithodea. 



LitJiodea . 

 LitJwdeacea 

 LitJiodidea . 

 Honioliois . 



Dana, Henderson. 



De Haan. 



Stimpson. 



H. Milne Edwards. 



Carapace broadly ovate, uneven, with a prominent 

 median rostrum in front; the regions well defined. The 

 first four pairs of legs well developed, c}'Hndrical or sub- 



