PAPERS. 



Page 



1. The Comparative Anatomy of the Tongues of the Mammalia. — II. Family 1. Simiidae. 



By Charles F. Sonntag, M.D., Ob.B., F.Z.S., Anatomist to the Society. (Text- 

 figures 1-9.) 1 



2. Note on tlie Capture (in London) of a rare Parasitic Fly, Hammomyia {Hykphila) 



unilineata Zett. By Lt.-Col. S. Monckton Copeman, F.R.S., M.D., F.E.O.P., F.Z.S. 

 (Text-figure 1.) 31 



3. The Bases of Classification of the Theriodontia. By D. M. S. Watson, F.Z.S., 



University College, London. (Text-figures 1-29.) 35 



4. Experiments on Colour-cbanges of the Spotted Salamander (Balamaudra mactdosa), 

 conducted in the Society's Gardens. By E. G. Boulenger, F.Z.S, (Curator of 

 Reptiles). (Plates I. & II., and Text-figure 1.) 99 



5. Contributions to the Morphology, Classification, and Zoogeography of Indian Oligo- 



cheeta. By J. Stephenson, D.Sc, F.Z.S., Lecturer in Zoology in the University of 

 Edinburgh. (Text-figure 1.) ». 103 



6. On the Structure of the Eeptihan Tarsus. By E. Bkoom, D.Sc, F.E.S., C.M.Z.S. 



(Text-figures 1-27.) 143 



7. A Contribution to the Anatomy of the Three-toed Sloth {Bradypus tridactylus). By 



Charles F. Sonntag, M.D., Ch.B., F.Z.S., Anatomist to the Society. (Plates I.-IV., 



and Text-figures 10-15.) 157 



8. Report on Deaths which occurred in the Zoological Gardens during 1920. By N. S. 



Lucas, M.B., F.Z.S., Pathologist to the Society 179 



