31 



There are, accordiDg to the foregoing abstract, about 

 573 genera and 1280 species properly classified in Mr. 

 Etheridge*s catalogue, of which 217 genera and 416 species 

 belong to the Tertiary period. The following list will 

 raise the number to 236 genera, and 448 species. 



The described Brachiopoda and MoUusca proper, of the 

 Tertiary period alone, represent 100 genera and 207 

 species. In my own collection there are specimens or 

 remains of at least 50 species still undescribed, making 

 in all, say, 260 species, as far as I know. 



The following fossils have living representatives, viz. : — 



1. Corhula sulcata, Lamarck. 



2. Limatula suhauriculata, Montagu. 



3. Cucullea concamerata, Reeve. 



4. Limopsis Belcheri, Adams and Eeeve. 



5. Do. aiirita, Brocchi. 



6. JPeduncuJus laticostatus, Quoy and Gaimard. 



7. Cylichna arachis, Quoy and Gaimard. 



8. Eulima subulata, Donovan. 



9. JVah'ca^oZiYa, Tenison Woods. 



10. Crossea Idbiata, Do. 



11. Trivia Europea, Montagu. 



Those having living representatives, according to this 

 account, scarcely represent 2\ per cent of the fossil species 

 included under the heading Tertiary period. In the 

 foraminifera and lower forms of life, of course, evolutionists 

 will expect to find a very much larger percentage, as the 

 conditions for their existence are not liable to such marked 

 changes as that to which the higher forms are subjected. 



Our raised beaches have not yet been touched in 

 Australia, so far as the classifier is concerned. On a 

 future occasion I will prepare a listot those forms obtained 

 by me from Badger and Barren Islands. I have already 

 discovered one or two new forms which appear to have 

 no living representatives. 



I am indebted for the material from which many new 

 Tertiary species were obtained to Mr. T. R. Atkinson, who 

 has worked most enthusiastically in the investigation of 

 the fossil remains at Table Cape. I am also under deep 

 obligation to Mr. Petterd, who has placed at my disposal 

 many undescribed new species recently dredged, for 

 reference purpose. 



The following are the new species referred to in the 

 above introduction : — 



