FISHES -REGAN. 45 



the essential similarity of the American and Australian fossils, which he included in 

 one genus, Miolania. However, admitting- their relationship and their distinctness 

 from all other Chelonians, it seems to me that these two well-marked types may he 

 regarded as different genera, If it he considered that several recent genera of the 

 Chelonia are represented in the Eocene by species quite like the modern ones, the 

 occurrence in Australia and South America of types so dissimilar — one of which 

 dates hack at least to the time when Lord Howe Island was part of the continent 

 of Australia, and the other is known from deposits that may he Miocene or perhaps 

 earlier — can he explained without inventing a Tertiary land-bridge. 



The conclusion is that neither the fresh-water fishes, nor the marine fishes, whether 

 Antarctic or South Temperate, support the theory that Antarctica has connected 

 Australia with South America in Tertiary times, nor, so far as 1 can read the evidence, 

 does the distribution of other groups of animals confirm this view. 



