PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 

 Series B. Vol. 89. No. B 616. 



BIOLOGICAL SCIENCES. 



AUG 281916 



CONTENTS. 



Page 



Notes on the Genus Toxoplasma, with a Description of Three New Species. 

 By H. G. PLIMMER, F.R.S., Professor of Comparative Pathology in the 

 Imperial College of Science and Technology, London. (Plates 9 

 and 10) 291 



Further Observations on Protozoa in Relation to Soil Bacteria. By 

 T. GOODEY, D.Sc, Protozoologist, Research Laboratory in Agricultural 

 Zoology, University of Birmingham ....... 297 



On the Occurrence of Gelatinous Spicules, and their Mode of Origin, in a 

 New Genus of Siliceous Sponges. By ARTHUR DENDY, D.Sc, F.R.S., 

 Professor of Zoology in the University of London (King's College). 

 (Plate II) . ' 315 



On the Experimental Production of Congenital Goitre. By ROBERT 

 MCCARRISON, M.D.. D.Sc, F R.C.P. (lately on Special Duty for the 

 Study of Goitre and Cretinism in India). (Plate 12) . . . . 322 



Obituary Notices of Fellows deceased : — August Friedrich Leopold 



Weismann ; Sir William Turner, KG.B xxvii — xxxviii 



printed for THE ROYAL SOCIETY and sold by 



HARRISON & SONS, 45, ST. MARTIN'S LANE, LONDON, W.C. 



Price Three Shillings and Sixpence. 



No. B 616. 



August 1, 1916. 



