of the Pacific Shores of North America. 511 



ANISOPODA. 



AEGEIA PUGETTENSIS. Dana. 



Argeia Pugettensis, Dana ; U. S. Exploring Expedition, Crust, ii. 804. 



PI. LIII. f. 7. 



Found under the thoracic shield of Crangon munitus. 

 Hab. Puget Sound, (Expl. Exped.) 

 Mus. Expl. Exped. 



ARGEIA PAUPERATA. Stimpson, n. s. 



This species is somewhat larger than the preceding ; the 

 head is comparatively smaller, more tumid, and bilobate ; 

 the egg-pouch covers the eggs more completely ; and the 

 thoracic branchial appendages are apparently absent in 

 some of the anterior segments. The inner branches of the 

 first three pairs of abdominal appendages are broader; 

 those of the last three pairs are wanting. Length, 0.35 ; 

 breadth, 0.23 inch. This description is taken from a 

 female. 



Found in specimens of Crangon Franciscorum, from San 

 Francisco Bay. 



PHYLLODURUS. Nov. gen. 



Feminaz pedes thoracis sat validi, toti ancorales, unguiculati ; appendicibus 

 branchialibus carentes. Appendices abdominis branchiales ; superiores late- 

 rales, laminis duabus asquis magnis elongatis ; inferiores papilliformes. Ab- 

 dominis segmentus primus setis dorsalibus nnguiculatis instructus. 



PHYLLODURUS ABDOMINALIS. Stimpson, n. s. 



This curious form of parasitic anisopods was found at- 

 tached to, and lying between the abdominal feet of the com- 

 mon Gebia, adhering by the sharp hook-shaped terminal 



