1891,] D. Prain — The Vegetation of tlie Coco Group. 313 



India, Burma, Malaja, Philippines, (not yet recorded from south 

 Andaman). 



RHIZOPHORB^. 



100. Rhizophoea mucronata Lamk. 



Great and Little Coco, frequent in mangrove swamps. 

 TrojDical shores of Africa, Asia, and N. Australia. 



101. Rhizophoea conjugata Linn. 

 Great Coco, common. 



Tropical shores of Asia, and Africa. 



102. Ceeiops Candolleana Arn. 

 Great Coco, common. 



Tropical shores of Eastern Hemisphere. 



103. Ceeiops Roxburghiana Arn. 

 Great Coco, not common. 



Tropical shores of Eastern Hemisphere. 



104. Bruguiera gtmnorhiza Lamk. 



In all the islands, common. This is the chief constituent of the 

 mangrove jungle in the group ; it germinates very freely also along the 

 sandy beaches though there it doubtless does not persist ; it also ger- 

 minates along the i-idges of coral that are formed bet ween the mainland 

 and small outlying islets like Lascelles Island, Rat Island, Button, and 

 others, and as the roots spread they help to collect the " drift " of the 

 tides and shew how it is possible for the island to increase in size with- 

 out postulating a general upheaval for the group. On bare rocky pro- 

 montories on the west coast where long rocky ledges and reefs of loose 

 boulders run many yards out to sea, numbers of seedlings also appear and 

 though these spots are exposed to the full force of the south-west monsoon 

 many of these resist the waves for at least several seasons ; the only 

 other constituent of the mangrove jungle that does this is Avicemiia, 

 many specimens of which though dwarf and weatherbeaten are evidently 

 of considerable age. Femphis, which also greatly affects such positions 

 is not partial to mangrove swamps proper at all and was never seen 

 along the creeks. In the small lake on Little Coco the water of which 

 was potable though not good almost all the constituents of a mangrove 

 swamp were growing^reely. 



Tropical shores of Eastern Hemisphere and Polynesia. 



COMBRETACB^. 



105. Teeminalia Catappa Linn. 



In all the islands ; one of the commonest trees on the shore and 



