WINDOW-PANE OYSTER. 227 



oysters on the beds for over 20 years. It is much more Ukely that 

 poaching has been so extensively and continuously practised, both 

 upon young oysters and pearl-bearing oysters, that the actual results 

 of the meagre fisheries which have taken place have given a highly 

 erroneous idea of the potential value of the beds. 



Division into Areas, and Results of Year's Work. 



It has been found convenient for the purposes of the work to 

 divide into twenty -two parts that portion of Lake Tamblegam which 

 contains the pearl beds. These parts are lettered A to W. With the 

 exception of the southern boundary of A and the eastern boundary 

 of B, these areas are separated from each other by two series of lines 

 running at right angles to each other. One series of lines are set 

 W. 60° N. , and the other at S. 60° W. (see Plate 2) . 



There are five lines running W. 60° N., starting from the south- 

 western end of the lake. These have the following position, which 

 may be followed on the chart shown on Plate 2 : — 



(1) A line running E. 60° S. from Peyaddimunai (not Hornell's 



Peyaddimunai, which is incorrectly placed). This 

 meets the opposite shore at the Sinna Palamput-aar (not 

 Hornell's river of that name ; he has interchanged the. 

 Sinna and Periya Palamput rivers) , and separates areas 

 U, V, and W from R, S, and T. 



(2) A line taken on the shore 350 yards N. E. of the Periya 



Palamput-aar and running E. 60° S., separating areas 

 R, S, and T from 0, P, and Q. 



(3) A line running W. 60° N. from Kakkaimunai, separating 



areas 0, P, and Q from K, L, M, and N. 



(4) A line running W. 60° N. from the mouth of the Polokarai- 



aru, separating areas K, L, M, and N from F, G, H. 

 and J. 



(5) A line running W. 60° N. from Kodaipota (Hornell's Kanna- 



munai), separating areas F, G, H, and J from B, C, D, 

 and E. 



There are three lines running S. 60° W. as follows : — 



(1) A line running S. 60° W. from Periya Vellai Kalmunai, 



separating areas B, J, K, Q, R, and W from C, H, L, 

 P, S, andV. 



(2) A line running S. 60° W. from Sinna Vellai Kalmunai, 



separating areas C, H, L, P, S, and V from D, G, M, 0, 

 T, andU. 



(3) A line runnings. 60® W. from Korrinjavat, separating areas 



D, G, M, 0, T, and U from E, F, and N. 



Area B is bounded on the eastern side by a line running due S. from 

 Periya Vellai Kalmunai, and area A is bounded on the southern side 

 by a line running due E. from the same point. 



2 H 6(7)12 



