ANNALS CARNEGIE MUSEUM, Vol, X 



Plate XXXVl, 



Diagram of diameters and heights of Polygyra alholahn's i^omiruhi (dapp. 



Mr, Bryant Walker collecting Polygyra goodrichi on Middle Sister Island, July 4, 1915. 



Mr. George H. Cl?pp collecting shells on Middle Sister Island, July 4. 1915. 



