toothed aperture, the Southern Pupilla, Pupilla australis , is found 
under stones and in the crevices of rocks. All these native snails 
are rare in the National Park and the surrounding districts, and 
are not in any way a nuisance. 
This cannot he said of the imported snails, which are found 
only in the cultivated portions of the park. The common 
European garden snail, Helix aspersa, is there in plenty, as it is 
in many parts of the world. Another introduction is the English 
Sandhill Snail, Euparypha pisana, a yellowish, depressed shell 
decorated with spiral, brown bands and measuring from one- 
quarter to half an inch in diameter. Quite different from the 
preceding is the Swollen Snail, Cochlicella ventricosa, with its 
small, cylindrical shell measuring a little over a third of an 
inch, yellowish white, streaked across the whorls with brown 
and sometimes with one or two spiral bands of dark brown. 
Slugs are plentiful, particularly the introduced Limax 
maximus and the cream-coloured, carnivorous slug, Testae ella 
haliotidea which, unlike the first, tapers anteriorly, and has the 
internal shell situated posteriorly. This slug feeds principally 
on earth worms, but will also eat other slugs, snails, and centi- 
pedes, and is therefore worth preserving. 
About nine species of freshwater snails occur in and about 
the National Park. Two of the commoner are Ameria tenuis- 
triatus, which is finely spirally striated, and Ameria aliciae, a 
spirally-ribbed species, both about half an inch long and in the 
form of a “left-hand” spiral. The small freshwater limpets, 
Ancylus australicus and the much rarer Gundlachia petterdi, may 
be found adhering to smooth river pebbles. Another minute 
shell is the Rams’-horn Snail, Planorbis isingi , a flat shell of a 
quarter-inch diameter. This and the much rarer Trumpet Snail. 
Fig. 40. 
Pupoides adelaidae 
Fig. 41. 
Ancylus asutralicus 
Fig. 42. 
Gundlachia petterd i 
