112 THE NAUTILUS. 



pine and spruce forest a continual delight. The Oreohelix were 

 beautiful in colors, quite equal to those neutral brown tints of the 

 Philippine snails. 



Everything, all summer long, in Sonorellas, Ashmunellas and 

 Oreohelix, except one Oreohelix and one group of Sonorella, was 

 found in the rocky slides or talus, and many were dead. I had 

 theories that dry weather, epidemics, insects or fungi had killed 

 them, but most of these theories are also dead, or in a dying con- 

 dition. Perhaps I did not stay long enough upon one slide to find 

 their home. It is nearly all slide work, and healthy. After sleep- 

 ing nearly half a year under the stars in the high woods, I am 

 strong as a farmer. Those invalids I chaperoned are well. 



Joilet, 111., Nov., 1913. 



PHYSA HETEROSTROPHA SAY IN EUROPE. 



BY ZDENKA FRANKENBERGER. 



Of late there have appeared in the literature many statements of 

 the presence of Physa acuta Drap. in Central Europe. It was found 

 in Leipsic, Gotha, Konigsberg, Jena, Dresden, Munich, Copen- 

 hagen, Basil, etc., almost always in botanical or other gardens, where 

 it was thought to have been brought in by the aquarists. In the 

 neighborhood of Prague we could confirm some years ago, a species 

 of Physa which was remarkable by its size and quite another form 

 of the shell than are the two common Bohemian species of Physa, 

 Physa fontinalis L. and Aplexa hypnorum L. It could not be identi- 

 fied with Physa acuta, but it is surely the American species, Physa 

 heterostropha Say, as it was stated already in the Catalogue of 

 Bohemian Molluscs 1 by Babor and Novak. With some care one 

 cannot be mistaken in the right determination of this snail, for both 

 the shell (with thicker walls, a lip in the aperture and of a large 

 size) and the animal (more robust, olivaceous) are quite different 

 from Physa acuta, which does not occur in the eastern parts of 

 Europe, and the eastern frontier of the distribution of which is the 



1 Babor u. Novak, Verzeichniss der posttertiaren Fauna der bohmischen 

 Weichtiere. Nachrbl. d. deutschen Malakozool. Ges., 1909. 



