Papers (continued). 



Page 



15. Eeport on the Deaths which occurred in the Zoological Gardens during 1910. By 



H. Q. Plimmhr, F.E.S., F.Z.S., Pres.R.M.S., Pathologist to the Society 318 



16. A Contribution to the Study of the Variations of the Spotted Salamander {Salamandra 



maculosa). By Edward Q-. Boulengbr. (Plate XV. and Text-figs. 99-102.) 323 



17. On the Mountain Nyala, TragelapJius buxtoni. By R. Lydekker. (Plate XVI. and 

 Text-fig. 103.) 348 



18. Observations on different Gibbons of the Genus Hylobates now or recently living in the 



Society's Gardens, and on SympJialangus Ryndactyhis, with Notes on Skins in the 

 Natural History Museum, S. Kensington. By Dr. F. D. Welch, F.Z.S,! 353 



19. Some New Siphonaptera from China. By Karl Jordan, Ph.D., F.E.S., and the 



Hon. N. Charles Rothschild, M.A., F.Z.S., F.E.S. (Text-figs. 104-124.) 365 



20. Contributions to the Anatomy of the Anura. By Frank E. Beddabd, M.A., F.R.S., 

 F.Z.S., Prosector to the Society. (Text-figs. 125-133.) 393 



21. On the Spermatophores in Earthworms of the Genus Pheretima { = Perichista). By 

 Frank E. Beddard, M.A., F.R.S., F.Z.S., Prosector to the Society. (Text-figs. 134^136.) 412 



22. A Rare Beaked Whale. By R. Lydekker. (Text-figs. 137-139.) 420 



23. Age-Phases of the Rorqual. By R. Lydekker 423 



24. On Longevity and Relative Viability in Mammals and Birds ; with a Note on the 



Theory of Longevity. By P. Chalmers Mitchell, M.A., D.Sc, LL.D., F.R.S., 

 Secretary to the Society 425 



25. Some new Parasitic Nematodes from Tropical Africa. By Robert T. Leiper, D.Sc, 

 M.B., F.Z.S. (Text-figs. 140-144.) 540 



ADDENDUM. 

 A Correction to Dr. R. T. Leiper's Memoir on the Entozoa of the Hippopotamus 565 



Titlepage i 



List of Council and Officers ' ii 



List of Contents iii 



Alphabetical List of Contributors ix 



List of Plates xrii 



List of Text-figures xviii 



New Generic Terms ixiii 



ladex XXV 



