PROCEEDINGS 



OF 



THE ROYAL SOCIETY. 



Series B. Vol. 86. 



No. B589. 



BIOLOGICAL SCIENCES. 



CONTENTS. 



Page 



Further Researches on the Extrusion of Granules by Trypanosomes and on 

 their Further Development. By W. B. FRY, Major R.A.M.C., and 

 H. S. RANKEN, M.B. (Glasg), M.R.C.P. (Lond.), Captain R.A.M.C. (With 

 a Note on Methods by H. G. PLIMMER, F.R.S.) (Plates 9-11)- • 377 



Morphology of Various Strains of the Trypanosome causing Disease in Man 

 in Nyasaland. — -The Wild-game Strain. By Surgeon-General Sir DAVID 

 BRUCE, C.B., F.R.S.. A.M.S. ; Majors DAVID HARVEY and A. E. 

 HAMERTON, D.S.O., R.A.M.C. ; and Lady BRUCE, R.R.C. . . . 394 



Morphology of Various Strains of the Trypanosome causing Disease in Man 

 in Nyasaland.- — The Wild Glossina morsitans Strain. By Surgeon- 

 General Sir DAVID BRUCE, C.B., F.R.S., A.M.S. ; Majors DAVID 

 HARVEY and A. E. HAMERTON, D.S.O., R.A.M.C. ; and Lady BRUCE, 

 R.R.C 408 



Infectivity of Glossina morsitans in Nyasaland. By Surgeon-General Sir 

 DAVID BRUCE, C.B., F.R.S., A.M.S. ; Majors DAVID HARVEY and 

 A. E. HAMERTON. D.S.O., R.A.M.C. ; and Lady BRUCE, R.R.C. . . 422 



The Excystation of Colpoda cucullus from its Resting Cysts, and the Nature 

 and Properties of the Cyst Membranes. By T. GOODEY, M.Sc. (Birm ), 

 late Mackinnon Student of the Royal Society ..... 4 2 7 



Protostigmata in Ascidians. By A. G. HUNTSMAN, B.A., M.B.. Biological 



Department, University of Toronto ....... 44° 



On the Origin of the Ascidian Mouth. By A. G. HUNTSMAN, B.A., M.B., 



Biological Department, University of Toronto ..... 454 



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No. B 589. 



June 12, 1913. 



