520 DELPHINID &. 
by this fossil may still exist in our seas, remains to be 
proved: until then, it may be regarded as an extinet 
species of Delphinide, for which | propose the name of 
Phocena crassidens. , 
Remains of Delphinida have been found in silt several 
feet below the surface in the “ Beeding levels,” and at 
the mouth of Cuckmeer. The most completely petrified 
specimen referable to this family of Cetacea, is the anchy- 
loid mass of cervical vertebre in Professor Sedgwick’s 
museum in the University of Cambridge. Respecting 
this specimen, which has belonged to a Cetacean as large 
as the Grampus or Narwhal, the Professor writes to me :— 
“Tt was found in the brown clay (alias till) near Ely ; 
but I have not the shadow of doubt that it was washed 
out of the Kimmeridge (or Oxford) clay, for both clays 
are near at hand. In condition, it is exactly like the 
bones of those clays, and is utterly unlike the true gravel 
bones, whether in the dry gravel or the till.” 
Subjoined is the figure of the anchylosed cervical verte- 
bree of the Phocena crassidens. 
Fig. 214. 
Cervical vertebrae of thick-toothed Grampus. Fens, Lincolnshire. 
