96 THE NAUTILUS. 



emarginata mighelsi was formerly so abundant, and 'not a single 

 living or dead shell could be found. The same was true at 

 Cross Lake. OLOF 0. NYLANDER. 



COCHLICOPA LUBRICA IN WESTERN PENNSYLVANIA. About the 



middle of October a friend living in Sewickley, Pa., first noticed 

 a lot of small shells on a flagstone walk at the side of his house. 

 He called me up by telephone and I requested him to get some 

 of the shells, which he did and they proved to be Cochlicopa 

 hilrica Mull. On Nov. 30 I visited the place and found the 

 living shells present in large numbers as I gathered over 100 

 fr*>m along the edge of the walk in a few minutes. In 25 years 

 collecting in the Sewickley Valley I have found this species de- 

 cidedly rare so their sudden appearance in the center of the 

 village is very interesting. With the lubrica were a number of 

 Vallonia excentrica St., which has become very common all 

 through the valley in the past few years. The specimens of lu- 

 brica, you will note, area small compact form averaging 5 mm in 

 length. GEO. H. CLAPP. 



PUBLICATIONS RECEIVED. 



A new Pearly Fresh-water Mussel of the genus Hyriafrom Brazil. 

 By L. S. Frierson. Proc. U.S.N.M., Vol. 47, p. 363, pi. 12. 

 Hi/ria amaznnia n. sp. 



List of Moilusca of Harding and Perkins counties. South Da- 

 kota Geological Survey, Bull. No. 6. 1914, pp. 95, 96. By 

 Wm. H. Over. In this little-known region, every contribution 

 is of value, giving records from the wide gap between the 

 better known States on the east and west. 



The Land and Fresh-water Molluscs of the Dutch West Indian 

 Islands. By Dr. J. H. Vernhout. Notes Ley den Museum, 

 Vol. 36, pp. 177-189. A useful compilation, with a bibliogra- 

 phy, and some new records for Curacao. 



