52 



n<ii)iii)OK nKi.ANi;. M.-.\. Kl. 



SUMMARY OF RESULTS. 



General results. 



In the Norwegian stocks at least, the course of the shield bands 

 has proved to be most constant in each species, of greater value for the 

 purpose of determination than most other external characters (especially in 

 fixed mattiiall; it would be advisable to submit the foreign stocks to a 

 renewed examination on this point (p. 11—12, fig. i|. 



With regard to internal characters the variation of the jaw, the radula 

 and above all of the reproductive organs was a general feature ivü/c de- 

 scriptions and figures in the text). 



In all species the distribution was revised (vide text, maps and appendix]. 



Results in Arion ater. 



V ar. castaiica. In addition to the vague statement of Friele (1853) this 

 variety has been found later at Balestrand in Sogn and at Breviksstranden 

 in Romsdalen. 



Var. rii/a previously was recorded by Friele (1853) from Sverresborg in 

 Bergen, perhaps as introduced ; it ver\' likely remained there, anyhow for 

 several years, and probably found in that place by Kyrre Grepp about 1890. 



Var. albolatcralis Roebuck is to be rejected for var. media Jensen, a 

 variety at first found in the neighbourhood of Bergen, later on at Sagvaag 

 on Stordöen, being apparently restricted to the western coast of Norway 

 (p. 19). 



The northern limit of the species is Ribbeneso, 70' N. L. (p. 20), and 

 in Norway it ascends to a height of 850 m. above the sea level (Opset 

 station, Bergensbanen). 



The parasitic nematode Lcptodcra appcndiculata Schneider, new to the 

 fauna of Norway, has been found in animals from Osteröen near Bergen 

 and from Tromöen near Arendal (p. 22). 



Results in Arion subfuscus. 



The shape of the receptaculum sometimes approaches that of Arion 

 circumschptus, presenting indications of a pointed end (fig. 21). 



Var. pegorarii Less, et Poll, is to be rejected for var. quadnfasciata 

 Jensen (p. 28). 



