CONTENTS OF No. 206.—New Series. 
MEMOIRS: 
Investigations on the Development of Trypansomes in the Tsetse-Flies 
and other Diptera. By E. A. Mincutn, Professor of Protozoology 
in the University of London. (With Plates 8—13, and two Text- 
figures) 4 : : ; 
The Nematocysts of Turbellaria. By C. H. Martin, B.A., Magdalen 
College, Oxford. (With Plate 14) . 3 
Doridoeides gardineri: a Doridiform Cladohepatic Nudibranch. 
By Sir CuHarztes Extot, Vice-Chancellor of the University of 
Sheffield, and T. J. Evans, Lecturer in Zoology in the same Uni- 
versity. (With Plates 15 and 16, and one Text-figure) 
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