EXPLANATION OF PIRATES. 

 PI.ATE VII. 



Upper figure. — Unbroken line of Pongamia glabra on the north side of the island. 

 Note the plants of Potamogeton pectinatus left hanging on the lower 

 branches by the retreating floods. Photo taken in October 1919, 

 1920. 



lyower figure. — I^ine of Pongamia glabra on the south side of the island with a single 

 tree of Barringtonia acutangula in the foreground. Note the re- 

 mains of Potamogeton and algae left on the shore. Photo taken in 

 October, 1919. N.B. — Owing to violent storms and unusually high 

 water level the deposit of weed was scanty in 1919. 



PI.ATE VIII. 



Upper figure. — -Tree of Salvadora persica on rocks on the north side of the island with 

 a large Nim behind it. Note the distorted trunk. Photo taken in 

 October, 1919. 



Lower figure. — Trees of Crataeva religiosa and Azadiracthta indica on the east side of 

 the island, overwhelmed by lianas (Derris scandens and Acacia 

 intsia, the latter in flower). The sand has been washed away from 

 the roots of the Crataeva, which has fallen over and sent out 

 upright branches from its prone trunk. The Acacia (the stem of 

 which is marked with a X) has grown up from the sand directly 

 over this tree, while the Derris extends from the neighbouring 

 Nim. In the background various trees, with dead stems of Jatropha 

 gossypifolia in front of them. Photo taken in October, 1919. 



Plate IX. 



Upper figure. — Another tree of Salvadora persica at thenorth-west corner of the island. 



Note the stems of Cissus quadrangularis festooned upon its branches. 



Photo taken in October, 1919. 

 Lower figure. — Large clump of Opuntia in the interior of the island, with bushes of 



Glycosmis pentaphylla interspersed with it and surrounded by a 



border of Oldenlandia Heynii. Photo taken in October, 1919. 



Plate X. 

 Upper figure. — Large Tree-Euphorbia {E. neriifolia) with Cissus quadrangularis on its 

 lower branches. Bushes of Glycosmis pentaphylla and young plants 



