56 Tansley and Frit sell. 
aureum is especially commonly present round the edge, fringing the 
more open country. Other common forms are Ceibera Odollam, 
Clerodendron sp. (C. inenne ?) and the rather scarcer Thespesia 
Lampas , whilst a number of climbers occur. Of typical lowland 
plants Eugenia caryophyllei is very common in between the 
mangroves. Limnanthemum and NyinpJiaca cover the surface of 
the water in places. 
The vegetation of the lake at Balapityia is thus, although to a 
considerable extent dominated by the mangrove formation, fairly 
representative of that intermingling of the littoral types of 
vegetation, which is clearly a common feature of the Ceylon 
estuarine waters. Our visit was too short a one however to enable 
us to collect data as to the cause of this intermingling in the lake 
under discussion, but it seems probable that both the above 
mentioned factors come into play here, viz: influence of man and 
steepness of banks. 
We append a list of the mangroves and semi-mangroves of 
the Ceylon coast; the forms placed first are the most highly 
adapted mangrove forms with specialized embryos or roots. The 
species we found dominant are printed in heavy type, those we have 
not observed, but which are recorded from the Ceylon coast, are 
given within parentheses. 
Rliizoplwra mucronata. 
Rhizophora conjugata. 
Ceriops Candolleana. 
(Ceriops Roxburghiana). 
Bruguiera gymnorhiza. 
{Bruguiera caryophylloides). 
Sonneratia acida. 
Sonneratia alba. 
Sonneratia apetala. 
Avicennia officinalis. 
Acanthus ilicifolius. 
Aegiceras majus. 
(Carapa moluccensis). 
(Lumnitzera coccinea). 
Lumnitzera racemosa. 
(Scypliiphora hydroplujllacea). 
Exccecaria Agallocha. 
Dolichandrone Rheedii. 
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