THE NAUTILUS. G3 



There seem to be about 15 valid species, not counting Adams' 

 undescribed forms. The largest is Phenacolepas galathea Lam., of 

 the South Pacific. 



LAND MOLLUSCA OF KENNEBUNKPORT, ME. 



BY GEORGE H. CLAPP. 



The collection was made during the months of July and August of 

 this year. Most of the shells were found in the woods back of the 

 "Casino "and extending from there to the ocean. The timber is 

 principally pine and spruce, with a few deciduous trees around the 

 edge of the woods and in swampy places. The best collecting 

 ground was in a small group of oaks and beeches at one corner of 

 the woods, and it was here that Polygyra sayii and most of the 

 Pnpidfe were found. The only species found everywhere through the 

 woods were Zonitoides arboreus and Pyramidulu striatella. In no 

 place were shells plentiful ; it was a case of collecting one at a time, 

 rarely two or three under the same stick or piece of bark. 



As the country rock is granite the molluscs probably get their 

 lime from the marine shells and " carapaces " of crabs (the common 

 shore-crab, Cancer irroratus (?)) which are scattered all through the 

 woods. I noted the following species : Mytilus edulis L., Modiola 

 modiolus L., Mya arenaria L., Lunatia heros Say, Buccinum tin- 

 datum L. 



On wet days one or more mollusks would be found " feeding" on 

 nearly every dead shell. Polygyra albolabris appears to be particu- 

 larly fond of the crab shells. The scarcity of some of the Pupidce 

 and other moisture-loving species may be accounted for by the fact 

 that the season was very dry. The shells of P. albolabris were some- 

 what darker than those found inland and are rather fragile, they 

 range from 24 to 28 mm. greater diameter, altitude 14 to 19 mm. 



Polygyra sayii is also dark-colored and very thin ; they range from 

 19i to 22 mm., greater diameter, altitude 11 to 14 mm. 



I am indebted to Dr. Pilsbry for identification of some of the 

 minute species. 



106. Polygyra sayii (Binn.), 7. 



