44 SPECIMENS OF CETACEA. 



6. Tympano-periotic bones, right, separate, from the same 



Whale. They correspond in characters with the left 



bones. 



7. Tympano-periotic bones, fused together, from the right 



and left sides of the foetus of the Longniddry B. 

 sibbaldi, each with the malleus and stapes. Tym- 

 panic length 4^ inches, breadth 2^ inches, height 

 2| inches. They resemble the adult in form, but are 

 smoother, especially in and near the keel-like ridge. 



8. Incus detached from the left tympanic of foitus of the 



Longniddry Rorqual. 



[Nos. 9 to 14 are baleen plates from the Longniddry 

 specimens, and their characters and structure are 

 described by Turner in Trans. Roy. Soc. Edin., 

 vol. xxvi., 1870.] 



9. Baleen. Two plates, 48 inches long and 17 inches wide. 



C(jlour black, with coarse black bristles. 



1 0. Baleen. A block of " intermediate substance " with narrow 



blades of baleen stripped off the palate of the Long- 

 niddry sibbaldi. The blades are dark brown in 

 colour, and the bristles are of a somewhat lighter 

 shade. By the action of spirit, in which the prepara- 

 tion is mounted, and of the light, a partial bleaching 

 of the original black has taken place. 



11. Baleen. A similar preparation of seven plates with 



intermediate substance from the same animal. 



12. Baleen. Another portion of the same wreath from about 



its middle. 



13. Baleen. The pharyngeal end of the left baleen wreath of 



the f fetus of the Longniddry sibbaldi. Colour slate- 

 grey ; bristles very fine, cream-coloured. 



14. Baleen. A portion of the mucous membrane of the palate 



of the foetus of the Longniddry sibbaldi. Rows of 

 folds of mucous membrane of different sizes, adapted 

 to the origin of both broad and narrow plates, are 

 shown. 



[Nos. 15 to 24 are portions of the skeleton of the 

 Longniddry B. sibbaldi.] 



15. Hyoid bone of female; body and cornua fused together, 



convex forwards, concave backwards ; cornu swollen 

 about the middle ; diameter in straight line between 

 tips of cornua 4 feet 7 inches, antero-posterior of body 



