of the Pacific Shores of North America. 511 
ANISOPODA. 
ARGEIA PUGETTENSIS. Dana. 
Argeia Pugettensis, Dana; U. S. Exploring Expedition, Crust. ii. 804. 
PLLHLELT 
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 ege-bouch covers the eggs more completely ; and the 
thoracic branchial appendages are apparently absent in 
Some of the anterior segments. The inner branches of the 
three pairs of abdominal appendages are broader; 
those of the last three pairs are wanting. Length, 0.85 ; 
con. 0.23 inch. This description is taken from a 
e. 
Found in specimens of Crangon Franciscorum, from San 
Francisco Bay. 
PHYLLODURUS. Nov. gen. 
Femince pedes thoracis sat validi, toti ancorales, unguiculati; appendicibus 
nchialibus carentes, Appendices abdominis branchiales; superiores late- 
tid laminis duabus zquis magnis elongatis; inferiores papilliformes. Ab- 
dominis Segmentus primus setis dorsalibus unguiculatis instructus. 
PHYLLODURUS ABDOMINALIS. Stimpson, n. 8. 
This curious form of parasitic anisopods was found at- 
fached to, and lying between the abdominal feet of the com- 
"n Gebia, adhering by the sharp hook-shaped terminal 
