364 Geoiyiiia Svrrf .- Hjjla aarea. 



Ridewood, W. G. Proc. Linn. Soc. Lond., 1902, p. 46-7. 

 Shore, — . Jour. Anat. and Phys. Lond., xv., 1901, p. 323. 

 Sweet, G. Proc. Roy. Soc. Vic, vol. ix., N.S., 1897, p. 264. 

 For further bibliography see Cole, Parker, Ridewood (1897), 

 etc. 



EXPLANATION OF PLATES XfX. AND XX. 



Fig. 1. — Whole vertebral column of specimen W, of Hyla 

 aurea, showing fused 7th and 8th vertebrae, and 9 and urostyle. 



Fig. 2. — Whole vertebral column of specimen X, with each 

 pair of transverse processes attached to the vertebra in front 

 of the normal one. 



Fig. 3. — Vertebrae 6, 7, 8, 9 and urostyle of specimen Y, show- 

 ing sacral processes on vertebra 8. 



Figs. 4 and 5. — Vertebrae 8, 9, and urostyle of specimens ZA 

 and ZB, showing well-developed processes on the urostyle. 



Fig. 6. — Right foot, showing abnormal 3rd and 4th toes, 

 dorsal view. 



Figs. 7a, 7b. — Right and left feet respectively, showing abnor- 

 mality in toes of each. Dorsal view. 



Figs. 8a, 8b. — Whole vertebral column of individual V, show- 

 ing fusion of vertebrae, etc. 8a, Dorsal view. 8b, Ventral vieAv. 



In each case the fioures are life-size. 



