CONTENTS OF No. 200.-New Series. 



MEMOIRS 



PAGE 



Ou the Structure of the Nepliridia of Diuophilus. By Chessw'ell 

 Sheaeee, Trinity College, Cambridge. (With Plates 29 and 30) . 517 



Contributions to our Knowledge of the Anatomy of Notoryctes 

 typhlops, Stirling,; Part III, The Eye. By Geokgina Stiteet, 

 D.Sc, Melbourne University. (With Plate 31) . . 547 



Structure and Origin of Canker of the Apple Tree. By James E. 

 Blomfield, M.A., M.D.Oxon. (With Plate 32) . . 573 



Review of Dr. Richard Goldschmidt's Monograph of Am phi oxides. 

 By A. WiLLEY, Hon.M. A.Cantab., D.Sc.Lond., F.R.S. (With 

 seven text-figures) ..... 5S1 



The Modification of the Sexual Characters of the Hermit Crab caused 

 by the Parasite Peltogaster (castration parasitaire of Giard). By 

 F. A. Potts, B.A., Trinity Hall, Cambridge. (With Plates 33 and 

 34) . . ". . . . .599 



On the Medusa of Microhydra ryderi, and ou the Known Forms 

 of Medusae inhabiting Fresh Water. By Edwakd Potts, of Phil- 

 adelphia, U.S.A. (With Plates 35 and 36) . . . 623 



On the Freshwater Medusa liberated by Microhydra ryderi. Potts, 

 and a Comparison with Limnocodium. By Edt;\'ard T. Browne, 

 B.A., Zoological Research Laboratory, University College, London. 

 (With Plate 37). . . . . .035 



With Title, Contents, and Index to Vol. 50. 



