CORALS AND BRYOZOA. 6 



distinguish them from every other fauna^ whether recent or 

 fossil. They have not mnch connection with those corals li^ving 

 in our present seas, and scarcely any vrith Tertiary formations 

 elsewhere. The first striking feature is the abundance of species 

 of Balanopkyllia . Second in importance is, perhaps, Flabellum. 

 Next to this comes a type of coral about which a few words must 

 be said in explanation. One of the first species sent to England by 

 me was what I then regarded as a TurbinoUa, but which Professor 

 Duncan determined to be a Caryophyllia. Subsequent examina- 

 tion induced me to remove the species to the genus Deltocyathus. 

 After seeing the New Zealand specimens, where the same type 

 exists, I think that a new genus must be erected for these corals, 

 which are intermediate in character between Deltocyathus, Cono- 

 cyathus, and Trochocyathus. I have named it Notocyatkus. It 

 may safely be said to be the most peculiarly characteristic 

 coral of the Southern Hemisphere, and it is equally represented 

 in Australian and New Zealand formations, though by different 

 species. Two, or perhaps three, of the Australian corals have 

 been identified with European Miocene or Pliocene forms, and 

 two with living species, one of which, Deltocyathus italicus, seems 

 to be found all over the world. 



After an examination of the New Zealand fossil corals, I 

 have found no certain specific identity with the Australian 

 tertiaries. Instead of any predominance of the forms or genera 

 common in Australia, I find that BalanophijlVia was absent from 

 the tertiaries corresponding with those of Australia, and occupies 

 quite an insignificant position in older beds. There are only 

 two species. One of these is a large and interesting form. The 

 genus Flabellum rises into extraordinary importance. Ten 

 species are here described, all of great beauty and interest. It 

 is very possible that some of these species may be varieties, which 

 only can be decided by examining larger collections of specimens. 

 Amphihelia is also well represented, the species being new and 

 beautiful, and there are two very beautiful corals belonging to 

 the genera Trochocyathus and Sphenotrochus. The European 

 resemblances of any of the species are small, but where they 

 exist they are to Miocene forms. There is a complete absence, 

 so far, of any of the Astrceida. One of the most remarkable 

 features is an encrusting member of the Oculina family, with 

 pali, for which I have erected the new genus Platyhelia. 



The New Zealand formations can boast of one very interest- 



