Page 



10. The Freshwater Crayinshes of Australia. By Geoffrey 

 Smith, M.A., Fellow of New College, Oxford. (Pis. 

 XI V.-XXYII. and Text-fig. 18.) 144 



11. Structure of the Alimentary Canal of the Stick-Insect, 

 Bacillus rossii Fabr. ; with a Note on the Partheno- 

 genesis of this Species. By Alfred E. Cameron, M. A., 

 B.Sc, Fullerton Scholar of the University of Aberdeen 

 and Research Student in the University of Manchester. 

 (Pis. XXYIII.-XXX.) 172 



12. Diagnoses of new Species of Terrestrial and Fluviatile 

 Shells from British and German East Africa, with the 

 Description of a new Genus (Eussoia) from Eusso 

 Nyiro River, B.E, Africa. By H. B. Preston, F.Z.S. 

 (Pis. XXXI. & XXXII.) 183 



13, Contributions to the Anatomy and Systematic Ari^ange- 

 ment of the Cestoidea.- — III. On a new Genus of Tape- 

 worms {Otiditce7iia) from the Bustard (Eupodotis kori). 

 By Frank E. Beddard, M.A., F.R.S., F.Z.S., Prosector 

 to the Society. (Text-figs. 19-30.) 194 



14. On the Milk-Dentition of the Ratal. By R. Lydekker. 



(Text-figs. 31 & 32.) 221 



15. On a Further Collection of Mammals from Egypt and 



Sinai. By J, Lewis Bonhote, M.A., F.L.S., F.Z.S. ... 224 



16, Report on the Deaths which occurred in the Zoological 

 Gardens during 1911. By H. G. Plimmer, F.R.S., 

 F.Z.S., Pathologist to the Society ,.... 235 



17. Mendelian Experiments on Fowls. By J. T. Cunning- 

 ham, M.A., F.Z.S 241 



18. Studies on Pearl-Oysters and Pearls. — I. The Structui-e 

 of the Shell and Pearls of the Ceylon Pearl-Oyster 

 {Margaritifera vulgaris Schumacher): with an Examin- 

 ation of the Cestode Theory of Pearl-Production. By 

 H. Lyster Jameson, M.A., D.Sc, Ph.D., F.Z.S. (Pis. 

 XXXIII.- XLYII. and Text-figs. 33 41.) 260 



