S/iclls found In Essex County. 127 



As a condensed view of the present knowledge of this 

 portion of the Zoology of Essex County, the list may be of 

 value, while it may serve at the same time to awaken new 

 zeal in further scrutiny. 



The following abbreviations have been employed to de- 

 note authorities. 



Gould's Report, &c., G. 



Boston Journal, &c., Bost. Jourri. 



Proceedings of the Boston Society, &c.. Bost. Proc, 



Stimpson's Shells of New England, St. Sh. 



Dr. Henry Wheatland, W. 



Dr. Wm. Prescott, P. 



Joseph True, Tr. 



S. Tufts, jr., T. 



Tufts Haskell, T. & H. 



Wm. Stimpson, St. 



J. P. Cothouy, Couth. 



Prof. Adams, A. 



Lamarck, Lam. 



Linnaeus, L. 



Adeorbis costulata. St. Bost. Proc. iv. p. 14. In deep 

 water off Cape Ann. 



Alasmadonta marginata. G. Shawshin River, Andover. 

 Amicula vestita. St. Sh. Chiton Emersonii. Couth. G. 

 Salem Harbor. W. 



Anatifa vitrea. Lam. On fuci thrown up on Lynn beaches, 

 after storms in summer. Tr. 



Ancylus fuscus. A. Andover. G. 



Anodon irnplicata. G. Ponds, Lynn. P. Brown's Pond, 

 Danvers, W. These and the other Naiades of New Eng- 



