EEYOZOA FROM NEW ZEALAND. 



43 



ultimately can only be done by taking into consideration the various 

 groups of fossils ; but the facies of those in hand is so recent, that 

 we are inclined to think that some authors have attributed too 

 great an age to the deposits containing them. That they are com- 

 paratively recent cannot be doubted, when we consider what a 

 large number are known living in the New-Zealand seas, or are 

 represented there by others very nearly related to them. Out of 78 

 species, or varieties, 61 are known living, 29 of these from New- 

 Zealand seas, 48 from either New-Zealand or Australian waters, 

 and 28 have been found fossil in Australia. 



Figures of a few of the chitinous covers of species discussed are 

 given, as they are the best indication of the shape of the true oral 

 aperture. Pigures 34 and 37 are copied and shaded from photo- 

 graphs, and on this account it has been convenient to give them on 

 a larger scale than in my previous papers. Mr. Busk called them 

 the " chitinous organs," which is a very incorrect term, as they can- 

 not in any way lay claim to be organs, but only covers of organs. 

 Neither the opercula nor the mandibles are universally chitinous, 

 although usually so, and it would seem best, when they cannot be 

 spoken of as opercula and mandibles, to call them Bryozoal covers. 



With the exception of these and fig. 25 the figures are all mag- 

 nified 25 times. 



List of Species*. 



1. Cellaria malvinensis, B 



2. Membranipora monostaehys, B. ... 



3. lineata, L 



4. Lacroixii, var. grandis, W. . . . 



5. Dumerilii, Aud 



6. nobilis, Rss 



7. solidula, Aid. 8f Hincks 



8. annulus, Manz 



9. cervicornis, Busk 



10. spinosa, Q. Sf G 



11. Memingii, B... 



12. trifolmm, S. Wood 



13. oeeultata, sp. nov 



14. Monoporella capensis, B 



15. , Tar. dentata, nov 



16. crassatina, W. 



17. disjuncta, Manz 



18. waipukurensis, sp. nov 



19. Steganoporella neozelanica, B 



20. Micropora lepida, Hincks 



21. variperforata, sp. nov 



be 



03 



45 



45 

 45 

 45 

 45 

 46 

 46 

 47 

 47 

 48 

 48 

 48 

 48 

 49 

 49 

 49 

 50 

 50 

 50 

 51 

 51 



3 



•frAZ 



7C- 



•X- 



7C 



J4, 



1, 2, 3, 

 4, 6 



2, 5, 6 



Allies and Localities. 



Crag. 

 Miocene. 



Napier Harbour. 



Crag. 



Whakati. 

 Pliocene (Italy). 



Whakati. 



* A or Z indicates that the form is known living in Australia or New Zealand. 

 l = Curdies Creek. 2=Mt. G-ambier. 3 = Bairnsdale. 4=Muddy Creek. 

 5=Aldinga. 6= Murray Cliffs. 



