Proc. R.I.Acad., Vol. XXXI. 



Part 15, Plate V. 















fi$ 







G. H. Pcthybridge, ///, 

 Fig. i. — Litholhamnium sand from beach in Mannin Bay. 



T. J. Westropp, photo. 



Fig. 2. — Fucus farms in Achill Sound. 

 Clare Ireland Survey.— Cotton : Marine Algae. 



