NUMBER OP ISLANDS 



343 



Table III. — Number of Islands from which Eock Species is 



REPORTED 



Class 

 Representing feldspar - ba- 

 salt magma. 



2. Representing transitions be- 

 tween Classes 1 and 3. 



3. Representing pyroxene - an- 

 desite magma. 



4. Representing transitions be- 



tween Classes 1 and 5. 



5. Representing peridotitic 



magma. 



6. Representing transitions be- 

 tween Classes 1 and 7. 



7. Representing 

 magmas. 



"alkaline" 



Names given by authors Number of islands 



Olivine basalt 32 



Feldspar (plagioclase) basalt 16 



"Basalt" 26 



Dolerite 14 



Melapbyre 2 



Olivine anamesite 1 



Basalt porphyrite 1 



Diabase 5 



Olivine diabase 3 



Diabase porphyrite 2 



Gabbro 13 



Olivine gabbro 2 



Norite 1 



- 118 



Andesitic basalt 2 



Basaltic andesite 3 



Olivine andesite 6 



Augite-olivine andesite 3 



14 



Augite andesite 37 



Hypersthene andesite 11 



Augite-hyperstbene andesite 



Pyroxene andesite 5 



Augite-hornblende andesite 4 



Hornblende andesite 12 



•'Andesite'' (probably pyroxenie) 16 



Augite porphyrite 1 



Augite diorite 1 



Diorite porphyrite 1 



Feldspar porphyrite 1 



Porphyrite l 



Diorite (in part ?) 7 



- 102 

 Picritic basalt 7 



Picrite 1 



Dunite 2 



Peridotite ] 



Wehrlite 4 



Lherzolite l 



Diallage rock 2 



11 



Traehydoleritic basalt l 



Essexitie gabbro 1 



Trachydolerite 2 



Nephelite basalt 7 



Nephelite-melilite basalt ?, 



Nephelite basantoid 1 



Nephelite basanite (bearing haiiynite) 2 



Basanite 1 



Melilite basalt 1 



Haiiynite-hornblende rock 1 



Haiiynophyre 1 



Magma basalt 1 



