PLATE 15. 



Bones of the fossil Finback Whale referred to ^Balaenoplmt utirsiphiiia, ham the Miocene deposits of Gay 

 Head, Martha's Vineyard, Mass. 



Figs. 1, 2, 3. Anterior view'^s of three caudal vertehrac from near the end of the series, showing the 

 change from circuhir to squarish outline as the tip is neared. (Collection M. C. Z., nos. 8743, 

 8742, .3742.) X i 

 Figs. 4, .5. Upper \ie\v of same bones shown in Figs. 2 and 3. The characteristic bracket-shaped depres- 

 sions and the foramina which open into them for the passage of blood vessels, are clearly seen. 



Xi 

 Figs. 6, 7, 8. The same three vertebrae shown in Figs. 1 , 2, 3 respectively, but from the lower side. 



In Figs. and 7 appears the characteristic rounded pit into which open the two foramina seen in 



Fig. 4 on the upper side. 

 Fig. 9. Fragment from the upper part of a rib, in the collection of the Museum of Comparative Zoology 



(no. 8744). X about |. 

 Fig. U). Centrum of a large vertebra showing the bases of the transverse processes and neural spine. 



The epiphyses had not yet fysed to the front and back ends of the centrum. (Collection of the 

 ^ Society, no. 9698). X i 



