SuTEB. — On Neio Zealand Mollusca. 279 



Abt. XX. — List of the Introduced Land and Fresh-water 

 Mollusca of Neio Zealand. 



By H. SuTER. 



[Bead before the Philosophical Institute of Canterbury, 4th November, 



1S91.] 



The first list of introduced species was published by Professor 

 F. W. Hutton (Trans. N.Z. Inst., vol. xvi., p. 211, and vol. xvii., 

 p. 57) ; and recently Mr. Charles T. Musson, of Sydney, has 

 published a paper " On the Naturahsed Forms of Land and 

 Fresh-water Mollusca in Australasia " (Proc. Linn. Soc. of 

 N.S.W., vol. v., ser. ii., p. 883), in which some additional 

 introduced species from New Zealand are mentioned. As I 

 have been fortunate enough to get acquainted with a few 

 more forms, I think it may be of some interest to give now a 

 list as complete as my present knowledge allows. 



1. Testacella, described by Professor F. W. Hutton as 

 T. vagans, is found in gardens in the vicinity of Auckland. 

 Mr. T. F. Cheeseman (Trans. N.Z. Inst., vol. xix., p. 170) 

 remarks that it is very likely only a naturalised species, pro- 

 bably T. ma2igei, Fer., which is found in Portugal and on 

 Teneriffe, but has also been introduced into Great Britain. I 

 think Mr. Cheeseman' s supposition to be fairly correct, as the 

 genus Testacella is restricted in its habitat to south-western 

 Europe and Algeria only, and it cannot belong to our native 

 fauna. 



2. Helicarion milligani, Pf. Mr. T. W. Kirk found one 

 specimen of this snail at South Karori, near Wellington, which, 

 no doubt, has been imported from Tasmania. 



3. Limax (AgrioUmax) agrestis, L. (= L. molestus, Hutt.). 

 Found almost everywhere where improvements on the native 

 soil have taken place. 



4. Limax (Heynemannia) maximus, L. Dunedin (F. W. 

 Hutton). 



5. Limax (Simrothia) rariegatus, Drap. (L. flaviis, L.). 

 Dunedin and Greyraouth (F. W. Hutton). 



6. Amalia gagates, Drap. Common in southern Europe, 

 scarce in England. Has, like the foregoing, been imported in 

 many parts of the world. Ohaupo and Auckland (Charles T. 

 Musson). 



7. Hyalina (Euhyalina) cellaria, Miill. {H. sydneyensis, 

 Cox). It is not synonymous with H. corneo-fulva, Pf., which 

 is a well-characterized New Zealand species, in form of the 

 shell nearer to Hyalina nitens, Mich., than to H. cellaria. 

 Bay of Islands ; Auckland; Napier (F. W. Hutton). 



