MK. W. H. FLOWER ON THE OSTEOLOGY OF THE SPERM-WHALE. 371 



PLATE LVII. 



Cranium of a young male Cachalot from Tasmania, presented (as were all the other 

 specimens from which these figures were taken) to the Museum of the Royal College 

 of Surgeons by W. L. Crowther, Esq. The animal was supposed by the whalers to be 

 about ten months old. 



Scale 1. 

 Fig. 1. Upper surface. 

 Fig. 2. Lower surface. 



ty. tympanic bone. aon. antorbital notch. 



The other letters as in the foimer Plates. 



PLATE LVIII. 



Vertebral column of the skeleton of the Tasmanian Cachalot, seen from above. 

 Scale ^2- 



PLATE LIX. 

 Vertebral column and chevron bones of the same skeleton, seen from the side. The 

 fourth and fifth chevron bones were missing. 

 Scale -Y-^. 



PLATE LX. 



Fig. 1. Hyoid bones of the same skeleton. 



sli. stylohyal. bh. basihyal. th. thyrohyal. 



Scale Y^. 

 Fig. 2. Fu-st rib of the right side of the same skeleton. Anterior ^dew. 



Scale Ya- 

 Fiff. 3. Sternum of the same skeleton. External surface. 



Scale X2. 

 Fig. 4. The same. Side view. 



Scale Yt- 

 Figs. 5, G. Two views of the pelvic bone of the same skeleton. 



Scale \. 

 Figs. 7, 8. Two other pelvic bones of Tasmanian Cachalots, referred to at p. 365. 



Scale ^. 



PLATE LXI. 



Fig. L Bones of the anterior extremity of another Cachalot, from Tasmania. 

 Scale ^. 



h. humems. r. radius. • 



u. ulna. 0. olecranon. 



