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Vol.. I. SKPTKMBKR, 1892, No. 6. 



THE IRISH LAND AND FRESHWATER MOI^LUSCA. 



BY R. P. SCHARFF, PH.D., B.SC. 



( Continued frovi page 90. ) 



GASTROPODA. 

 P U L M N A T A . 



Genus— HELIX. 



Helix pygmsea, Drap. 

 I. — III. IV. V. VI. VII. VIII. — X. XI. XII. 



This very minute species has a very wide distribution, but owing to 

 its small .size is not easily detected. 



Foreign Distribution. — Great Britain, Continental E^urope, Siberia, 

 Sicily, Madeira, and throughout North America. 



Helix rotundata, Miiller. 

 I. II. — IV. V. — VII. VIII. IX. X. XL XII. 



This species is extremely common in Ireland, and one can hardly turn 

 over a stone without finding it. 



Foreign Distribution. — It ranges probably over the whole of Con- 

 tinental Europe and Great Britain, Sicily, Corsica, Azores, Madeira. A 

 closely allied species, H. ruderata, probably lived in England during the 

 glacial period, but is now confined to more northern latitudes and the 

 Alps. 



Helix rupestris, Drap. 



I. II. — — V. — VII. VIII. IX. — XI. — 



Thompson (15) refers to this species under the name of H. umbilicata 

 (Mont.), and mentions that it is commonly distributed throughout the 

 southern three-fourths of Ireland, but Mr. Milne (10) found it equally 

 abundant at Rockville, in Donegal. It "is very common on the Aran 

 Lslands, Co. Galway. 



Foreign Distribution. — Great Britain, central and southern Europe, 

 Portugal, Sicily, Syria, Tunis, and Algiers. 



Helix pulchella, Miill. 

 I. II. — IV. V. — VII. VIII. IX. — — XII. 



Commonly distributed in the greater part of Ireland chiefly in dry 

 places. The ribbed variety (//. costata, Miill), is generally found in com- 

 pany with the type. 



Foreign Distribution. — Great Britain, continental Europe, Sicily, 

 Corsica, Azores, Madeira, Canaries, St. Helena, Siberia, and North America. 



A 



