CONTENTS OF No. 246-New Series. 
MEMOIRS : 
PAGE 
On Phoronis oval is, Strethill Wright. By Sidney F. Hakmer, 
Sc.D., F.B.S., Keeper of Zoology in the British Museum (Natural 
History). (Published by permission of the Trustees of the British 
Museum. (With Plates 7-9) . . . .115 
The Embryonic Development of Trichogramma evanescens, 
W estw., a Monembryonic Egg Parasite of Donacia simplex, 
Fab. By J. Bronte Gatenby, Exhibitioner of Jesus College, 
Oxford. (With Plates 10-12) .... 149 
On the Development of the Cape Cephalodiscus (C. gilchristi. 
Bidewood). By J. D. F. Gilchrist, M.A., D.Sc., Ph.D. (With 
Plates 13 and 14) ..... 189 
Note on the Sex of a Tadpole raised by Artificial Parthenogenesis. 
By J. Bronte Gatenby, B.A., Exhibitioner of Jesus College, 
Oxford. (With 5 Text-figures) .... 213 
An Easy Way of Demonstrating the Nuclei of Nerve Fibres. By 
Henry E. Beburn, Student of Medicine. (From the Physiological 
Laboratory, King’s College, London) .... 217 
On a Larval Actinian Parasitic in a Bhizostome. By C. Badham, 
B.Sc., Demonstrator in, Zoology, University of Sydney. (With 3 
Text-figures) . . . . . . 221 
The Early Development of the Spleen of Lepidosiren and Protopterus. 
By G. L. Purser, B.A. (Sometime Coutts -Trotter Student, Trinity 
College, Cambridge. (With Plates 15-17) . . .231 
A Note concerning the Collar Cavities of the Larval Amphioxus. 
By K. M. Smith, A.B.C.S., D.I.C., and H. G. Newth, Demonstrator 
in Zoology, Imperial College of Science and Technology. (With 
Plate 18) . . . . . . .243 
