IREDALE : THE CHITONS OF THE KEEMADEC ISLANDS. 51 



Fiji, and not with New Zealand. The Chiton fauna would confirm 

 tlie non-existence of a Neozelanic land connexion, such as must hare 

 been between tlie Kermadecs and New Zealand. 



Lord Howe Island again shows little direct kinship with either of 

 the other two groups. The terrestrial fauna, the marine fauna, and 

 the flora all agree in indicating this group as an outlier of New 

 Caledonia. The Neozelanic element is entirely missi7ig in every branch, 

 but "the neighbourhood of the Australian continent has made an 

 impression ... on the . . . island". In making this statement 

 the facts are in luind confirming such and will be fully given in 

 a succeeding paper. New Caledonian Chitons are now being collected, 

 and when these come to hand a comparison will be made with the 

 Lord Howe forms. 



Since the preceding was written Mr. Hoy Bell has discovered the 

 existence of a species of Cryptoplax at Lord Howe Island. This 

 unexpected discovery remarkably confirms my conclusions regarding 

 the relationships of this Chiton fauna, since with the scant material 

 yet available I am unable to distinguish the Lord Howe shells from 

 the New Caledonian Cryptoplax huerteli, Rochebrune. 



EXPLANATION OF PLATES I AND II. 



Plate I. 

 Fig. 



1. rarachiton viestayercE, n.pp. 



2. Ischnochiton kermadecensis, var. exquisitus. 



3. ,, ,, n.sp. 



4. Eudoxochiton poyiexus, n.sp. 



6. ,, ,, side view. 



8. ,, ,, front view of median valve. 



5. ,, imitator, n.sp. 



7. ,, ,, side view. 



9. ,, ,, front view of median valve. 



Plate II. 



10. Lepidoplcurus suhtropicalis, n.sp. 



17. ,, ,, side view. 



11. OnitJiochiton oliveri, n.sp. 



12. Plaxipliora mixta, n.sp. 



15. ,, ,, exterior of posterior valve. 



16. ,, ,, interior of posterior valve. 



18. ,, ,, exterior of median valve of immature specimen 



showing sculpture. 



13. Rhyssoplax exasperata, n.sp. 



14. SypharocJiiton themeropis, n.sp. 



