56 



lant'-nna fragilis; the shells and floatinc? egg-masses of this 

 mollnsk were abundant at Cameron during the spring of 1905. 



Bulla striata; in shallow water, New Harbor Islands. 



Melampus flavus; abundant at the Chandeleur Islands, and 

 at Cameron. 



Succinea campcsiris; found in great numbers on the grass 

 ir all the marshes along the coast. 



Helix fraturna; taken at Cameron in the summer of 1901. 



Polygyra triodontoides ; from the Chandeleur Islands (?) 

 1904. 



Scaphopoda — Denialiiim gouldii; empty shells found on th.> 

 beach at Cameron. 



Pelecypoda — Leda concentrica ; taken in the dredge in 

 twelve feet of water off Calcasieu Pass, the empty shells of this 

 form are very abundant on the beach east of the jetties at Cam- 

 eron. 



Area pcxata; abundant at the Chandeleur islands. 



Scapharca campechensis ; abundant in the shallow water 

 near the gulf beach at Cameron. 



J>01:ihs hamatus; taken on the east beach, Chandeleur 

 Islands. 



Awdiola tidipa; occurs abundantly in shallow water in the 

 marshes abount the Chandeleur Islands. 



3Iodiola plicata var. semicosiata ; found in abundance over 

 the whole Louisiana coast attached to stones, piles, and especial- 

 ly abundant among the densely crowded "coon" oysters. 



Anomia glahra; common among oysters at Cameron. 



Anomia simplex; found attached to living scallops at the 

 Chandeleur Islands. 



Pinna muricata; abundant on the flats on the east side of 

 the Chandeleur Islands. Most of the specimens of this large 

 lamellibraneh contained a greater or less number of small blaclc 

 pearls, as many as eighteen being found in a single specimen. 



Pinna seminuda; the empty shells of this form were abund- 

 ant on the east beach at the Chandeleur Islands. 



Ostrea virgianica; the American oyster, is abundant in all 

 of the shallow bays and bayou; in the marsh along the coast. 



Pecten irradians; very abundant on the shallow Hats on 



