IX 



Page 

 PocooK, R. I., F.R.S., F.Z.S., Curator of Mammals. 



Exhibition of a series of the molar teeth of Elephants. 303 

 Exhibition, on behalf of Mr. E, Gerrard, of the skin 

 of an abnormally coloured Red Deer 307 



Regan, C. Tate, M.A., P.R.S., F.Z.S. 



Account, illusti-ated. by lantern-slides, of the Fresh- 

 water Fishes of Great Britain 303 



ROBEKTS, MOELEY. 



The Function of Pathological States in Evolutioiu 237 



Seth-Smith, D., F.Z.S., Curator of Birds. 



Exhibition of a mounted specimen of a hybrid 

 Cockatoo 308 



Tayler, Noel, B.Sc. (Lond.). 



A Case of Hermaphroditism in a Lizai'd, Lacerta 

 viridis. (Text-figures 1-3.) 223 



Watson, D. M. S^ M.Sc, Capt. R.A.F. 



On Heymouria, the most primitive known reptile. 

 (Text-figures 1-15.) 267 



Wood- Jones, Prof. F., F Z.S. 



Exhibition of a cast and set of Rontgen-i-ay photo- 

 graphs taken from a Chimpanzee which had died from 

 pulmonary tuberculosis 310 



Woodward, Dr. A. Smith, F.R.S., V.P.Z.S. 



On two new Elasmobranch Fishes {Crossorhimis juras- 

 sicus, sp. nov., and Frotospinax annectans, gen. et sp. no v.) 

 from the Upper Jura-ssic Lithograpliic Stone of Bavaria. 

 (Plate I.) 231 



Proc. Zool. Soc. — 1918. 



