JOURNAL OF CONCHOLOGY. 369 



THE LAND MOLLUSCA OF BRISTOL COUNTY, 



MASSACHUSETTS, U.S.A. 

 By JOHN H. THOMSON, C.M.Z.S., &c. 



Bristol county comprises a portion of the south part of 

 Massachusetts, situated on a part of Buzzard's Bay and the 

 Atlantic Ocean, the portion which I have explored for mollusca 

 comprises the south part of the same, viz., the city and towns 

 of New Bedford, Dartmou-th, and Westport, together with the 

 adjoining town of Tiverton, Rhode Island. In the latter town, 

 a high rocky ridge on the west shore of Stafford Lake has 

 afforded me many specimens of our minute species not found 

 elsewhere in the region examined, and one species Hyalina 

 Wheatieyi, Bland, found only hitherto in Tennessee, more than 

 1000 miles south of this locality. Not having studied the 

 fluviatile species for many years, I do not feel competent to 

 catalogue them. The towns of Westport and Tiverton contain 

 several large " ponds " or lakes, mostly surrounded by dense 

 woods, and in these locations I have been most successful in 

 my gleanings. 



Hyalinia cellaria Miiller. — New Bedford. Introduced. 

 H. nitida Miill. — Having some years ago found specimens in 



Tiverton, Rhode Island, on the " rocky heights " before 



spoken of, I submitted some of them to the late Dr. 



Lewis and he decided they were this species. 

 H. arborea Say. — New~Bedford, Dartmouth, Westport, and 



Tiverton. Abundant. 

 H. electrina Gould. — Westport and Tiverton. Not common. 



I doubt the identity of this shell with H. viridula Menke. 



Found near water under sticks, logs, &c. 

 H. indentata Say. — Dartmouth, Westport, and Tiverton. 



