53 



CRUSTACEA. 



Cirrepedia — Lepas anatifera. 



Lepas anserifera; both of these forms are found attached to 

 wreckage and drift wood thrown up on the beach at Cameron 

 after storms. ^ 



Balanns ehfnevs; found on rocks, wharf piles and shells ail 

 along the coast. 



Dichylaspis mulleri; this stalked barnacle is found attached 

 to the gills of the common edible crab, Callinectes sapidus. 



Decapoda — Panaeus seiiferiis; the large edible shrimp 1-^ 

 common all along the Louisiana coast. 



Palaemon tenuicornis; a small shrimp; is common along the 

 coast. 



Alpheus hetcrochclis; "pistol crab," common on the oyster 

 reefs atX!ameron. 



Cphannrhim vittatnm: found inhabiting shells of Neverita 

 T'ud Purpura. 



Camhariis day-Id. 



Camharus heini; these two crawfish are abundant in thi^ 

 fresh water pools about Cameron. 



Mcnippc nodoformis; the stone crab occurs in shallow water 

 along the coast. 



Callinectes sapidus; the southern edible crab, abundant 

 along the whole gulf coast. 



Ocijpode albicans; found on the sand beach at Cameron. 



Uca mordax; occurs in the marshes near salt water on all 

 parts of the coast. 



Petrolisfhes armatus; found on the beach at Cameron a^nong 

 the " gulf "^ weed, which is wasbed up during storms. 



Libints^duhig; common in shallow water along the coast, 

 many specimens are found living beneath the bell of large 

 Stomolophus. 



Polyonix macrochelis ; occurs as a commensal in the tubes of 

 Chaetopterus. 



Pinnixa chaetopieres; occurs as a commensal in the tubes 

 of Chaetopterus. 



Pinnotheres macidaius; occurs inside the mantle of Pinna 

 seminuda and is found occasionally in Pecten irradiens. 



