343 
New Zealand Flora, with a Reply to Criticism. 
meet the necessities of the case. If the endemics are dying out, then they 
are dying out in a purely mechanical way, in ‘wheels within wheels \ 
whether they have or have not wides of the same genus beside them. 
Wides dotted; extension N. includes Kermadecs, E. Chathams. 
Every single family and genus in the New Zealand flora shows one of 
two types of arithmetical arrangement in these tables. Either, as in 
Ranunculaceae, the endemic species occurring in each successive zone of 
ioo miles vary from a small figure up to a maximum and then down again, 
