Ill 



C O N T E N T S . 



PART No. 72. APRIL 1913. 



Papers. 



E. Heron-Allen. F.L.S., F.R.M.S., awl A. Euiland, F.R.M.S. 

 The Foraminifera in their Role as World- builders : A 

 Review of the Foraminiferous Liiw stones and Other Rocks 

 of th^ Eastern and Western Hemispheres (Plates 1-3) 



W. M. Bale, F.R.M.S. Notes on Some of the Discoid Diatoms . 



Henry Whitehead, B.Sc. Some Notes on British Freshwater 

 Rhabdocoelida a Group of Turbellaria (Plate 4) 



Charles F. Rousselet, F.R.M.S. The Rotifera of Devils Lake, 

 with Description of a New Brachionus (Plates 5 and (3) 



Arthur Dendy, D.Sc, F.R.S. President's Address By- Pro- 

 ducts of Organic Evolution (Plate 7) . 



David Bryce. On Five New Species of Bdelloid Rotifera (Plates 

 8 and 9) ........ 



Notes. 



E. M. Nelson, F.R.M.S. A New Low-power Condenser 



E. M. Nelson. F.R.M.S. Xavicula rhomboides and Allied Forms 



E. M. Nelson, F.R.M.S. On Microscope Construction and the 



Side Screw Fine Adjustment (Figs. 1 and 2 in text) 

 E. M. Nelson, F.R.M.S. Note on Pleurosiqma angukitum (Figs. 



3 and 4 in text) ........ 



E. M. Nelson, F.R.M.S. Actinoci/clus Ralfsii and a Coloured 



Coma .... ..... 



Notices or Books ........ 



PAGH 



1 



17 

 4.3 

 57 

 05 



83 



95 

 90 



90 



98 



100 

 101 



Proceedings, etc. 



Proceedings from October 22nd, 1912, to February 25th, 1913, 

 inclusive ......... 



Forty-seventh Annual Report, 1912 r 



Report of the Treasurer. 1912 . 



103 

 113 



120 



PART No. 73, NOVEMBER 1913. 



Papers. 



E. Heron-Allen, F.L.S., F.G.S., F.R.M.S., and A. Earland, 

 F.R.M.S. On some Foraminifera from the North Sea, 

 dredged by the Fisheries Cruiser " Huxley " (International 

 North Sea Investigations England) (Plates 10 and 11) . 



12 1 



'\J 



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