105 



Planche IV. 



iJulimus abbreviatus 1 Neritina Montrouzieri 7 



— Loyaltyensis 2 Hydrocena rubra 8 



Neritina Expansa 3 Physa perlucida 9 



— guttulata 4 Neritina suavis 10 



— flexuosa 5 Navicella Nana 11 



— incerta G Hélix Fabrei 12 



