114 



CHAPTER I 



TRICHONISCUS PROVISORIUS RaCOV. 



Brit. Isl., C Eur., N Eur. (in green- f Nfld. 



houses). 



TRICHONISCUS PUSILLUS Brandt, /. parthenog. (? demivirgo Blake) 



Icel., Faeroes, Brit. Isl., N & C Eur. f Wash.; NE U.S.A., E Can., Nov. 



Scot., Nfld. 



TRICHONISCUS PYGMAEUS G. O. Sars 



Brit. Isl., N & C Eur. (in the north in f New York, lUin., Nfld. 

 greenhouses). 



TRICHONISCUS (CORDIONISCUS) STEBBINGI Pat. 



Brit. Isl., W Eur. to S Swed. (Loh- f Oreg., Mass. (in greenhouses), 



mander, in litt.). 



TYLOS LATREILLI Ad. & Sav. 



Coasts of S Eur., N to C France, Asia (f) Florida; Bermudas. 

 Minor, N. Afr., Macaron. Isl. C Amer., W. Indies. 



Mollusca, Gastropoda — Land- and freshwater Molluscs 



The main sources of information on Mollusca were Ehrmann (1937), Taylor 

 (1902-21), Ellis (1926), and Licharev & Rammelmayer (1952), for Eurasia, Pilsbry 

 (1939-48) and La Rocque (1953), for North America. Other references may be 

 found in the bibliography (p. 126 a.f.). The nomenclature follows Pilsbry (I.e.). 

 Valuable information was obtained from Mr. H. W. Walden, Stockholm. 



Terrestrial or amphibious species closely connected with the seashore are not 

 considered. 



CEPAEA (helix) hortensis O. F. Miill. (fig. 29) 



Icel., Faeroes, Brit. Isl., Eur. (except the (t)Mass.-Queb., N. S., Nfld., ?Labr.; 

 southern peninsulae), E to Leningrad ? Greenl. 



& Vitebsk. 



t New Zeal. 



cepaea (helix) nemoralis L. 



Brit. Isl., Eur. (widely), E to Balticum, f NE U.S.A. S to Tenn., E Can., An- 

 E. Pruss., Bohcm., & Bosnia. ticosti. 



