Jurassic Gasteropods.—
Jurassic gasteropods are found sparingly in the limestone of the Geraldton District and other localities in Western Australia. The more important of these are Pleurotomaria (P. greenoughiensis), Turbo (T. australis) ([Fig. 101 A]) and Rissoina (R. australis) ([Fig. 101 B]).
Fig. 101—MESOZOIC GASTEROPODA.
A—Turbo australis, Moore. Jurassic. West Australia
B—Rissoina australis, Moore. Jurassic. West Australia
C—Natica ornatissima, Moore. Cretaceous. Queensland
D—Pseudamaura variabilis, Moore sp. Cretaceous. Queensland
E—Rostellaria waiparensis, Hector.—Cretaceous. New Zealand
Cretaceous Gasteropods.—
The Queensland gasteropod fauna comprises Cinulia a typical Cretaceous genus, Actaeon and Natica. These occur in the Lower Cretaceous or Rolling Downs Formation. Cinulia is also found in South Australia at Lake Eyre with Natica (N. ornatissima) ([Fig. 101 C]). Pseudamaura variabilis ([Fig. 101 D]) is found in New South Wales, Queensland and South Australia; whilst Anchura wilkinsoni occurs in Queensland and South Australia.
In New Zealand the Waipara Greensands (Cretaceous) contain a species of Rostellaria (R. waiparensis) ([Fig. 101 E]).
Cainozoic Gasteropods.—