KKIDTHJOF ØK LAND. M.-N. Kl. 



LITERATURE CONSULTED. 



(The principal works to the study of the Norwegian species are those of Taylor, 

 Steen i5ER<; and Heynemann, the papers based upon Norwegian material are chiefly those of 

 EsMARK, Jensen and Westerlund). 



1910. Adams, Lionel B. Observations on the Pairing of Arion ater IL.I. — Journ. of Conch., 

 vol. 13, p. 116— 119, 6 fig. 



19 1 5. Arldt, Theodor. Zur Ausbreitung der Land- und Sü6wassermollusken. — Arch, für 

 Naturgesch., Vol. 81 A, Heft 4, p. 16 — 84. 



1909. Babor, J. und J. Novak. Verzeichnis der posttertiären Fauna der böhmischen Weich- 

 tiere. — Nachrichtsbl. Deutsch. Mal. Ges., Vol. 41, p. 118—128. 



1878. BiNNEV, W. G. The Terrestrial Air-Breathing Mollusks of the United States and the 

 Adjacent Territories of North America. Vol. 5. — Bull. Mus. Comp. Zool., 

 Cambridge, Mass., Vol. 4, p. 1—449. 9° P's. 



1890. — A Third Supplement to the Fifth Volume of the Terrestr. Air-Br. Moll. Un. St.a. 



Ad. Terr. — Bull. Mus. Comp. Zool., Cambridge, Mass., Vol. 19, p. 183 — 



226, 1 1 pis. 

 1869. Broeck, Ernest van den. Observations malacologiques. — Ann. Soc. Mai. de Belgique. 



vol. 4, p. 81 — 92, pi. II. 

 1868. Claus, C. Beobachtungen über die Organisation und Fortpflanzung von Leptodera 



appendiculata. 24 p., 3 pi. — Schriften Ges. Beförd. gesammt. Naturwiss. zu 



Marburg. Supplement, Heft 3. 

 1884. Clessin, S. Deutsche Excursions-Mollusken-Fauna. 658 p., ill. 



189 1. Cockerell, T. D. a. On the Geographical Distribution of Slugs. — Proc. Zool. Soc. 



of London, p. 214 — 226. 

 1897. C0LLINGE, Walter E. On some European Slugs of the Genus Arion. — Proc. Zool. 



Soc. of London, p. 439 — 450, pi. XXIX — XXXI. 

 1909. — Colour Variation in some British Slugs. — Journ. of Conch., vol. 12, p. 235 



— 237- 

 1905. D.\ll, Willl\m H. Land and Fresh Water Mollusks of Alaska and .\djoining Regions. 



171 p., ilL — Alaska, Vol. XIII. 

 1880. EsMARK, BiRGiTHE. Bidrag til Kundskaben om Udbredelsen af Norges Land- og Fersk- 



vandsmoUusker i forskjellige Egne af Landet. — N\'t Mag. for Natur\\, vol. 



25. P- 215 — 223, 2 tig. 



1882. — Land and Freshwater Mollusca in the Arctic Regions of Norway. — Tromsö 



Mus. Aarsh.,' vol. 5. p. 93—104, i fig.. 



1883. — Nyt Bidrag til Kundskaben om Norges Land- og Ferskvandsmollusker. — N\-t 



Mag. for Naturv., vol. 27, p. 77 — iio, r pi. 

 1886. — On the Land and Freshwater Mollusca of Norway. — Journ. of Conch., vol. 5, 



p. 90—131. 

 1886. Es.MARK, B. og Z. Aug. Hover. Die Land- und Süfswassermollusken des arktischen 



Norwegens. — Mal. Blatt., N. F., Vol. 8, p. 84—123. 

 1853. Friele, Joachim. Norske Land- og Ferskvands-Mollusker, som findes i Omegnen af 



Christiania og Bergen. 65 p. 



