The Irish Land and Freshwater Mollusca. 153 



Foreign Distribution. — Great Britain, Scandinavia, Finland, Russia, 

 Transylvania, Austria, Switzerland, Germany, north Italy, France, Spain, 

 Portugal, Thibet, China, Siberia, and North America (/'. hirsutus, Gould). 



Flanorbis glaber, Jeffreys. 

 — II. — — V. — VII. VIII. — — XI. XII. 



Alder described this species as F. IcEvis about the same time as Jeffreys, 

 and under this name it is mentioned by Thompson (15). PL parvus of Say, 

 a North American species, if not identical with PL glaber, is very closely 

 allied. 



Foreign Distribution. — Great Britain, Scandinavia, north and south 

 Germany, Bohemia, Hungary, Belgium, Corsica, Sardinia, Sicily, Algiers, 

 Morocco, Madeira, and west Siberia. 



Flanorbis crista, ly. 



— II. — — V. — — VIII. IX. — — — 



PL imbricatns, the name adopted by Thompson (15), and also PL natitileus 

 are more recent designations for the same species. It is the smallest 

 Irish species of Planorbis. 



Foreign Distribution. — Great Britain, south Scandinavia, Finland, 

 south Russia, Transylvania, Austria, Switzerland, Germany, France, Italy, 

 Sicily, Spain, Portugal, Algiers, and Morocco. 



Planorbis fontanus, Lightf. 

 I. — III. — V. VI. VII. — IX. — XI. XII. 



What was looked upon as PL nitidtis by Jeffreys, Thompson, and others, 

 is this species. The real PL nitidtis of Miiller is the next. 



Foreign Distribution. — Great Britain, south Scandinavia, south 

 Russia, Caucasus, Transylvania, Austria, Switzerland, Germany, France, 

 Spain, Portugal, Algiers, Morocco, Tibet, and Siberia. 



(Flanorbis nitidus, Miiller.) 



Thompson (15) records this species as Irish on the authority of 

 Humphreys, who is said to have found it in Tipperarj^ but as no other 

 Irish collector has found a specimen since, and the original does not seem 

 to be in existence now, I think I am justified in excluding it from the 

 Irish list. 



Genus— ANCYLUS. 



Ancylus fliiviatilis, Miiller. 



I. II. — IV. V. VI. VII. — IX. X. XI XII. 



This is an extremely common species, and occurs in small streams close 

 to the sea-shore as well as high up on mountains. 



Foreign Distribution. — Great Britain, south Scandinavia, Finland, 

 Transylvania, Austria, Germany, Switzerland, Italy, Sicily, P'rance, Spain, 

 Portugal, Algiers, Madeira, and Canaries. 



Ancylus lacustris, L- 



— — — — V. VI. VII. _ — X — XII. 



Although we have only few records of this species from Irish localities 

 it will probably be found to be more generall}' distributed. 



Foreign Distribution,— Great Britain, south Scandinavia, south 

 Russia, Caucasus, Transylvania, Austria, Switzerland, Germany, France, 

 and Italy. 



(TO BE CONCI^UDED.) B 



