CONTENTS OF No. 220.-New Series, 



MEMOIRS : 



FAOK 



The Division of the Collav-Cells of Clathrina coriacea (Montagu); 

 a Contribution to the Theory of tlie Centrosonie and Blepharophist. 

 By Muriel Eobertson, M.A., and E. A. Minchin, M.A. (With 

 Plates 25 and 2(5) . . .011 



Studies on Avian Hteniuprotozoa. 1. — On Certain Parasites of the 

 Chaffinch (Fringilla coelebs) and the Kedpoll (Linota 

 riifescens). By H M. Woodcock, D.Sc.(Lond.), Assistant to the 

 University Professor of Protozoology. (With Plates 27-31) ()41 



Studies on Ceylon Hrematozoa. No. II. — Notes on the Life-Cycle of 

 Hffiniogregarina nicoria?. Cast, and Willey. By Muriel 

 EoBEBTSON, M.A. (With Plates 32-41 and 1 Text-figixre) 741 



On the Origin and Migration of the Stinging-Cells in Craspedote 

 medusa?. By Charles L. Boulexger, M.A. Camb, Lecturer on 

 Zoology in the University of Birmingliaiu. (With Plates 42 and 

 43 and 5 Text-figures) . . .763 



The Researches of Boixvier and Bordage on Mutations in Crustacea 

 of the Fauuly Atyida?. By W. T. Calman, D.Sc. (With 4 Text- 

 figures) .....•• 785 



