THE NAUTILUS. 75 



Buzzard's Bay, not quite on the Cape but near enough. As Pat 

 says, " contagious " to it. The marine forms here are affected by 

 brackish water. In one arm I could get Ilyanassa obsoleta in abund- 

 ance, but failed to find Bittium and the Odostomias. In another 

 arm with the fresh water they occur, but more or less eroded. A 

 colony of fine specimens of Paludestrina salsa occurs in a pot hole on 

 the marsh, and my daughter, Miss Ruth Winkley, located the same 

 form sparingly among the flags along the border of the Agawam 

 river at East Wareham. More should be said of the fresh-water 

 collecting. The Agawam river is rich in specimens. Unio com- 

 planatus abundant and large, Anodonta cataracta occasional, and 

 Anodonta implicata abundant and the finest specimens I have seen. 

 My largest is 6|- inches long and weighs 5^ ounces. (Gould gives 

 the largest as 4^ inches long.) Sphaerium secure is very abundant. 

 I obtained an unusually fine series of Anodonta beaks at this spot. 

 On the whole I may say that a section of this stream is the richest 

 in animal life I have ever seen in New England. 



Ditches in the older cranberry bogs and small brooks abound in 

 specimens of Pisidium, and Amnicola limosa and porata occur 

 sparingly. Other fresh-water species occur like Planorbis, Physa, 

 etc., but they are in better form earlier in the season, so I neglected 

 them. I failed to find land shells. It has been an exceedingly dry 

 season, and that may be the reason. I regret that I had no dredge 

 with me. The good results from shore collecting would indicate the 

 same from deeper waters. 



A NEW SPECIES OF FLITMINICOLA. 



BY H. A. PILSBRY. 



The genus Fluminicola of Stimpson comprises globose, Somato- 

 gyrus-\\ke snails of streams and springs in and west of the Rocky 

 Mountains. A list published by the writer in 1899 J enumerates 

 seven species and one subspecies. A new form was among the 

 mollusks collected by the late Rev. Mr. Ashmun in Idaho, during 

 the last year of his life. 



lr rhe NAUTILUS, XII, March, 1899, pp. 123, 124. 



