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THE P. GRISEUS. 

 PLATE XXI. 



P. Griseus of Cuvier (Ann. Mus. xix. and Reg. Ani. 290), 

 Fr. Cuvier (Mam.). 



THIS handsome looking animal has been obtained 

 only on the west coast of France, and it has been 

 after years of labour, and many mistakes, that, 

 through the united efforts of Cuvier, Dumeril, and 

 especially of D'Orbigny, that its true characters hare 

 been ascertained. Even externally it will be observed 

 to differ widely from the other species, and the in- 

 ternal differences of the bones of the cranium, &c. 

 are equally marked. The head is large, obtuse, and 

 somewhat rounded ; the upper jaw is several inches 

 larger than the lower; the dorsal fin commences 

 about the middle of the back, and is elevated and 

 pointed; the pectorals are very much developed; 

 the tail also is large. The total length is ten or 

 eleven feet ; the colour is a bluish -black above, and 

 a dull white beneath ; and these merge into each 

 other on the flanks. There are no teeth in the 

 upper jaw and only eight in the lower. 



At first glance it has some resemblance to the 

 Deductor or Ca'ing "Whale, and in some particulars 

 of their history, as their associating in groups and 

 uttering loud cries, they agree. The slightest com- 



