84 SPECIMENS OF CETACEA. 



15. Tympano-periotic bone, left. Length of tympanic 2^ 



inches, breadth If inch, height 1| inch. Periotic, 

 length 2| inches. 



16. Periotic bone, right (old male). Donor — Dr R. Gray. 



17. Hyoid bone from No. 6. The body and cornua have not 



fused, the stylo-hyoids are distinct. 

 Loch Ranza, Arran. Donor — Dr N. Fullarton. 



18. Vertebrae, cervical and upper eight dorsal, from No. 5. 



Hamna Voe, Shetland, 1871. 



19. Vertebrae, nine lumbar, fi-om No. 5. 



Hamna Voe, Shetland, 1871. 



[No. 20 to No. 22 are from the Collection formed by 

 Professor Goodsir.] 



20. Radius, longitudinal section of. One end of the radius 



of No. 1, showing the cartilaginous epiphysis and the 

 Haversian canals in its substance. 



21. Tongue of Hyperoodon, showing the papillaj on the 



dorsum, especially at the base, and the fringes 

 of mucous membrane on the borders and at 

 the tip. 



22. (Esophagus, transverse section through, inverted, showing 



longitudinal folds of the mucous lining. 



23. Stomach of the Hyperoodon, No. 1, inflated and dried. 



It consisted of a large cardiac or proximal division 

 into which the a?sophagus opened, an intermediate 

 division consisting of Ave subglobular compartments 

 varying in size, and a large distal or pyloric division, 

 which opened into the funnel-shaped dilated duo- 

 denum. See Turner in Journ. Anat. and Phys., vol. 

 XX. p. 470, 1885. 



[To illustrate the appearance of the ventral surface 

 of the stomach in Hyperoodon, a figure from the 

 description by Sir Wm. Turner of the Dunbar 

 specimen. No. 2, in the Journ. Anat. and PJtys., 

 vol. xxiii., 1889, is reproduced. The numerals 1 

 to 7 indicate the gastric compartments. D, duo- 

 denum ; OE, oesophagus. See page 85.] 



