96 Proceedings of the Royal Irish Academy. 



EXPLAXATIOX OF PLATES. 

 Plate IY. 



FIG. 



1. Lough iN'eagh. Tj'pical \"iew looking over lake. Near Toome. 



2. Shore of Lough Neagh, showing sand-flats exposed at Shane's Castle. 

 •3. Banks of Lough Js'eagh and lake ^-iew. 



PIJ.TE V. 



4. Pollan-nets diying on banks of Lough Xeagh, near Antrim. 

 •5. ilouth of Six Mile Water, near Antrim. 



6. Banks of Lough N'eagh, near Six Mile Water, showing gi-asses and 



wooded nature of country. 



7. Fishing-boat hauling Pollan-nets near banks. This boat was used for 



the plankton investigations. 



Plate VI. 



8. Type of Plankton. April, 1910. Chiefly OscUlatoria and Grompho- 



sphaeria. 



9. Type of spring Plankton. 



10. Type of Plankt-on, July 27, 1910. 



11. Tvpe of Plankton at time of Tahellaiia maxiniTim, August 18, 1910. 



12 and 1-3. Sui-faee Plankton during period of water-bloom, late September, 

 1910. 



