Campeloma to nullify the effects of food concentrated at traps. Traps 

 should be tried in lakes with clean, sandy bottoms. 



In the streams tested the traps are specific for Campeloma. Other 

 species of snails are not taken in the traps and only occasional bivalves, 

 Alasmidonta calceolus and Sphaerium sp., have been collected from them. 



SHORT NOTES ON FRESHWATER SNAILS 



Artesian Weils. ... If you live near an artesian well that isn't capped 

 you might have some fun. Place a bag of wire window screen over the 

 outlet and leave it for a few days. You may find that it will catch some 

 strange forms of freshwater snails, crustaceans, etc. Some snails found in 

 this manner were found to be blind . . . — Frank Lyman 



Don't Overlook the Snow Pools. No pool, however small, should be 

 ignored because it appears too insignificant to contain molluscan life. The 

 pools of quarries, fields, and waste areas as well as wayside runs and water 

 courses of melted snows and rains of spring should be given careful atten- 

 tion and if the visit, which should be made soon after the disappearance of 

 the snow, is unsuccessful, successive visits should continue until molluscan 

 denizens appear or it can be determined that the pool is uninhabited. 

 Certain species which inhabit these transitory waters have a life span of 

 only one or two years and the greater portion of this is spent in hibernation 

 in the damp earth of the bed of the pool or its deep mud during the 

 summer months after the complete evaporation of its water. Then they 

 suddenly reappear in the spring when the water has been warmed by the 

 sun and warm rains and for a brief period swarm over the surface of the 

 pool. Again, as the water evaporates, they disappear to be seen no more 

 until the following spring or until heavy rains refill the depression suffi- 

 ciently to permit a resurrectionary opportunity of a few hours. 



A notably large Gyraulus circumstriatus Tryon was found in such a 

 pool that had remained unnoticed, although only a few feet from the 

 highway, through a number of springs. By the second week of June this 

 pool had completely evaporated and no visible water appeared during the 

 remainder of the year. Yet Gyraulus reappeared the following year. Fossaria 

 dalli F. C. Baker, a rare shell in this region, was discovered in an abandoned 

 meadow pool of seasonal origin not over 20 feet in diameter at the time of 

 discovery. Two weeks later the pool was non-existent, having disappeared 

 by evaporation and soil absorption. — Clifford L. Blakeslee, reprinted 

 from Mollusca of the Niag,ara Frontier Region. 



FRESH WATER MUSSELS 



By Henry van der Schalie 

 Reprinted from 1941 Annual Report, American Malacological Union 



Articles dealing with collecting and preparing fresh water mussels for 

 a cabinet have appeared from time to time in the past. Among the most 



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