890 NATURALISED FORMS OF LAND AND FRESH-WATER MOLLUSCA, 



Mr, E. A. Smith in his list of Aus. F.-\V. Shells (Jonrn. Linn. 

 Soc. Zool. 1881) states there are two tablets of this species in the 

 British Museum, originally from the Cuming collection, and 

 labelled North Australia. 



As this species has not been seen in any of the colonies, so far 

 as T am aware, we can hardly properly include it in the Aus- 

 tralian fauna without some confirmatory evidence. 



Neritina FLUViATiLis, Linn6, 1758. 



Ranging from Fin mark to Sicily ; found on stones and walls in 

 canals and rivei's. 



New Zealand : reported from the Waikare river (Kirk). 



Arion ater, Linne, 1758. 



Very variable ; commonly called the black slug. Black, chocolate, 

 red, yellow or greenish, sometimes whitish, coarsely tubercled, 

 foot usually yellowish ; shell consisting of granules only, internal ; 

 back not keeled. From 3 to 5 inches lonsf. 



Ranging from Siberia to Corsica. Introduced into United 

 States. Commonly found in woods, fields and gardens in moist 

 places ; about wells and pumps. 



New Zealand : Dunedin (Hutton) ; Auckland, crawling over 

 the roads after rain (Musson). 



Arion fuscds, Miiller, 1774. 



Arion incommodus, Hutton, Trans. N.Z. Inst., XL, p. 331. 

 An inhabitant of N.W. Europe. 

 New Zealand : Dunedin (Hutton). 



Arion hortensis, Miiller, 1774. 



A small slug, varying in colour from black to brown, rufous, 

 yellowish, grey, or greenish, usually striped longitudinally, tuber- 

 cled, foot lighter than back, not keeled, shell internal, and 

 consisting of granules only. About 1^ inches long. 



Of European origin, ranging from Siberia to Corsica. It has 

 made its way to North America. Found in fields and damp 

 places, under logs and stones. 



