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Modiola. 

 M. modiolus. Common on the soa shore among roots of kelp. 

 M. plicatula. In ditches of the salt marshes. 

 M. discrepans. Amongst the roots of kelp. 

 M. glandula. Taken from the stomachs of fishes. 



Pecten. 

 P. Magellanicus. ^Mutilated specimens at Phillips' Beach. 

 P. islandicus. One specimen at Phillips' Beach. 

 P. concentricus. A few single valves at Point Beach. 



Anomia. 

 A. ephippium. Beaches at Lynn. 

 A. aculeata. Plenty among the roots of kelp. 

 A. squamula. On the inside of old shells brought up from 

 deep water. 



Terebratula. 

 T. caput-serpentis. Taken from stomachs of fishes. 



Chiton. 



C. fulminatus. Found among roots of kelp and from fishes 

 stomashs. 



C. ruber. On stones brought up by kelp, and from fishes 

 stomachs. 



C. albus. From fishes stomachs. 



C. Emersonianus. From fishes stomachs ; animal inclosed 

 in a sack. 



Lottia. 

 L. testudinalis. Found adhering to rocks on sea-shore. 

 L. alveus. Found adhering to rocks, wood, shells and stones; 

 they were plenty in the Mill Pond twenty years ago. 



Dentalium. 



D. dentale. Found in stomachs of fish at Swampscott. 

 Cemoria. 



C. Noachina. Found in stomachs of fishes. 



Crepidula. 



C. fornicata. Found adhering to rocks, wood, shells, to the 



backs of crabs, to the back of Limulus polyphemus, and to the 



backs of their own species : when separated from the thing it 



adheres to, and laid on its back, just under the surface of water, 



* Living specimens found iu the North River, near Orno's Point — 

 also, at Bovorly Bax— Rare- II. W. 



