THE NAUTILUS. 47 



MOLLUSKS FROM BEKEIEN COUNTS, MICHIGAN. 



BY FRANK C. BAKER. 



Some time ago a day was spent in the virgin woods known 

 as the Warren Woods, situated near Three Oaks. The wood- 

 land borders the Galien River and is in the southwestern part 

 of Berrien County, only a few miles from Lake Michigan. The 

 forest is untouched by man and is a veritable paradise for the 

 botanist and nature-lover. It is probable that systematic search 

 would greatly increase the number of species listed, which were 

 gathered while engaged in general nature work. The Sphaerii- 

 dae were identified by Dr. V. Sterki. 



Pisidium scutellatum Sterki. Galien River. 



Sphserium occidentale amphibium St. Galien River. 



Symphynota costata (Raf.). Galien River. 



Pomatiopsis lapidaria (Say). Galien River. 



Pomatiopsis cincinnatiensis (Lea). Galien River. 



Physa gyrina Say. Small stream flowing into Galien River. 



Physa walked Grand-all. Small stream flowing into Galien 

 River. 



Galba parva (Lea). Small stream flowing into Galien River. 



Galba humilis modicella (Say). Small stream flowing into 

 Galien River. 



Succinea ovalis Say. Warren Woods. 



Succinea avara Say. Warren Woods. 



Succinea retusa Lea. Warren Woods. 



Pyramidula alternata (Say). Warren Woods. 



Pyramid ula perspectiva (Say). Warren Woods. 



Pyramidula cronkhitei anthonyi Pilsbry. Warren Woods. 



Agriolimax campestris (Say). Warren Woods. 



Zonitoides nitida (Muller). Warren Woods. 



Vitrea hammonis (Strom). Warren Woods. 



Circinaria concava (Say). Warren Woods. 



Polygyra albolabris (Say). Warren Woods. 



Polygyra thyroides (Say). Warren Woods. 



Polygyra palliata (Say). Warren Woods. 



Polygyra fraudulenta (Say). Warren Woods. 



Polygyra tridentata (Say). Warren Woods. 



