THE NAUTILUS. 



VOL. XXIV. OCTOBER, 191O. No. 6 



MOLLUSKS OF UNITY, MAINE. 



BY S. STILLMAN BERRY. 



Malacologically speaking, as it were, little Waldo county is one of 

 the least known regions in the state of Maine. Although the town 

 of Unity in its extreme northwest corner boasted one of the earliest 

 -conchologists of New England, little work appears to have been 

 done since, and in glancing over the pages of Mr. Lermand's " Shells 

 of Maine " we find that eight species and two varieties are all that 

 the author could positively accredit to the county. The early con- 

 chologist referred to is one Dr. Milliken who sent his shells to Dr 

 J. W. Mighels and our present knowledge of them is gained from 

 the lists and in one case (Lymncea decollata) the descriptions of the 

 latter. The present writer has had occasion to spend considerable 

 leisure from time to time in the self-same town of Unity, and it is 

 with the hope of filling in another of the gaps that the following list 

 of mollusks collected is given. 



Thanks are due to Mr. Charles W. Johnson for opportunity to 

 compare specimens of Lymncea decollata with some of Dr. Mighels' 

 own specimens and for numerous other kindnesses. I am likewise 

 indebted to Mr. George H. Clapp for aid in determining some of the 

 smaller terrestrial species. 



Unio complanatus (Sol.). Abundant in Lake Winnecook, as are 

 also three following species in less degree : 



Lampsilis cariosus (Say). 



Lampsilis radiatus (Gmel.). 



Anodonta marginata Say. 



