54 THE NAUTILUS. 



glochidia of this mussel, which found in this region congenial envi- 

 ronment, and thus the mussel became established and is propagating. 

 In the western waters, L. ventricosa prefers similar ecological condi- 

 tions: rivers and streams of medium or small size, with riffles and 

 rapidly flowing water, and gravelly bottom. 



Very likely the same cause accounts for the accidental introduc- 

 tion of Gambarus obscurus ; in seining for bass, for instance, in 

 western Pennsylvania, it would be quite impossible not to catch a 

 number of this crawfish. 



This is an interesting instance of the stocking of a stream with a 

 mussel species by the help of fish. Lefevre and Curtis (1. c., p. 192) 

 discuss this way as a possible means of mussel transportation ; how- 

 ever, they express some doubt as to its practicability. But here we 

 have, apparently, the demonstration that this is possible, and having 

 happened once quite by accident, it is to be expected that it also 

 might be successfully accomplished when intended and done with 

 the proper care. 



NEW ENGLAND NOTES. 



BY REV. HENRY W. WINKLEY. 



A careful search at Wood's Roll and Chatham, on Cape Cod, 

 reveals more specimens of the species described as Pyramidella 

 (Sulcorinella) bartschi. These have been compared with the type 

 by Dr. Bartsch as well as myself, and they show it to be an Odosto- 

 mia. The name is therefore changed to Odostomia (Evalea) bartschi. 

 Mr. W. F. Clapp has also found it within the cape. 



Short trips to a few points reveal Odostomias, and their distribu- 

 tion should be noted. The four species, Odostomia trifida, bisutur- 

 alis, winkleyi and P. fusca, are to be found at low tide in inner 

 waters as follows: In a small creek in the marsh near the station at 

 Rowley, Mass. (This same spot is the most northerly locality where 

 I have found Paludestrina salsa.} 



At old Newbury. Mass., in the Parker River, in eel-grass patches, 

 is another colony. The third is in Great Bay, New Hampshire, at 

 a spot half way between Dover and Portsmouth. 



Last summer I obtained the best lot of Pyramidettidse I have ever 

 seen. My stay at Chatham was short, and confined to low-tide col- 



