90 THE NAUTILUS. 



Lake the water flows into Otsego Lake and a number of species 

 occur which are not found in Canarlarago. From the latter the 

 streams empty into the Susquehanna River and species finally inter- 

 mingle. 



Amnicola limosa Say. In every lake and a large number of 

 streams. 



Pomatiopsis lapidaria Say. Canadarago Lake. 



Valvata tricarinata Say. Weaver, Canadarago and Allan Lakes. 



Somatogyrus integer Sa}'. Sunset Creek. 



Campeloma decisum Say. Canadarago Lake. 



Omphalina fuliginosa Griflf. Sunset Hill, near Canadarago Lake. 



Omphalina inornata Say. Sunset Hill. 



Zonitoides nitidus Miiller. Woods near Richfield Spa. 



Zonitoides arboreus Say. Sunset Hill. 



Gfstrodonta ligera Say. Sunset Hill. 



Pyramidula allernata Say. Everywhere with other species (one 

 albino farm). 



Pyramidula striatella Anthony. East of Sunset Hill. 



Polygyra tridentata Say. Sunset Hill, west of Canadarago Lake. 



Polygyra Sayi Binney. Sunset Hill, east of Canadarago Lake, 

 near Oak Creek. 



Polyyyra albolabris Say. Cooperstown, near Canadarago Lake, 

 Sunset Hill. 



Polygyra palUata Say. Washed down Town Creek. 



Polygyra tlyroides Say. East of Canadarago Lake. 



Polygyra monodon Rack., \ar.fraterna Say. Woods near Rich- 

 field Spa. 



Vallonia pulcheJla Miiller. In fields, everywhere. 



Circinaria concara Say. Sun?et Hill, near Allan Lake. 



Vertigo ovata Say. Under bark, near Richfield Spa. 



Vertigo milium Gould. Near Sunset Creek. 



Cocldlcopa lubrica Miiller. Cooperstown (Council Rock), Rich- 

 field Spa. (town), near Young's Lake. 



Carycliium exigmim Say. Near Sunset Creek. 



Succinea ovalis Gld. Near Canadarago Lake, near Oak Creek, 

 Cooperstown. 



Succinea obliqua Say. Sunset Hill, in fields. 



Succinea totteniana Lea. Near Allan Lake. 



Succinea retusa Lea, var. peariensis Walker. Near Oak Creek. 



