Exhibitions and Notices (continued). 



Page 



The Secretary. Report on the Additions to the Society's Menagerie during the month 



of October, 1918 309 



Miss K. Lander, F.Z.S. Description and exhibition of the method of preparing skeletons 



by the use of trypsin 310 



Mr. E. Hatsciiek. Description and exhibition of investigations into the forms assumed by 



drops and vortices of gelatin in various coagulants 310 



Prof. F. Wood-Jones, F.Z.S. Exhibition of a cast and set of Rontgen-ray photographs 



taken from a Chimpanzee which had died from pulmonary tuberculosis 310 



PAPERS. 



10. Comparison between the Lower Jaws of the Cynodont Reptiles Gomphognathus and 



Cynognathus. By Dr. Branislav Petronievics. (Text-figures 1-8.) 197 



11. On a new Genus of Extinct Mnscardine Rodent from the Balearic Islands. By 



Dorothea M. A. Bate, Hon. M.B.O.U. (Plate I. and Text-figures 1 & 2.) 209 



12. A Case of Hermaphroditism in a Lizard, Lacerta viridis. By Noel Tayler, B.Sc (Lond.). 



(From the Zoological Department, University of London, University College.) (Text- 

 figures 1-3.) 223 



13. On two new Elasmobranch Fishes (Crossorhinus jurassicus, sp. nov., and Protospinax 



annectans, gen. et sp. nov.) from the Upper Jurassic Lithographic Stone of Bavaria. 



By Arthur Smith Woodward, LL.D., F.R.S., V.P.Z.S. (Plate I.) 231 



14. The Function of Pathological States in Evolution. By Morley Roberts 237 



15. Notes on the Eeavers at Leonardslee, 1916-1918. By Sir Edmund G. Loder, Bart., 



Vice-President Z.S 255 



16. On the Madagascar Frogs of the Genus Mantidactylus Blgr. By G. A. Boulenger, 



F.R.S., F.Z.S 257 



17. Ciliary Action in the Internal Cavities of the Ctenophore Pleurobrachia pileus Fabr. 



By James F. Gemmill, M.A., M.D., D Sc., F.Z.S. (Text-figures 1 & 2.) 263 



18. On Seymouria, the most primitive known reptile. By D. M. S. Watson, M.Sc, Capt. 



R.A.F., Lecturer in Vertebrate Palaeontology, University College, London. (Text- 

 figures 1-15.) 267 



Titlepage i 



List of Council and Officers ii 



List of Contents iii 



Alphabetical List of Contributors . vii 



Index l xi 



