18 



right intermaxillary, and the base of the two maxillaries 

 doubled by the occipital. The maxillary forms the anterior 

 angle of the orbit, in front of which it has a deep emargina- 

 tion or notch, and close to this notch, on each side of the 

 head, is a deep hole, which must be considered as answering 

 to the sub-orbital foramen in other animals ; although, as 

 Cuvier says, it is in these Cetacea, more correctly speaking, 

 super-orhital. 



The posterior angle of the orbit is occcupied by the point 

 of the zygomatic apophyse of the temporal ; but this does 

 not quite join the post-orbital apophyse of the frontal, so that 

 the orbit is, as it were, open at this place. 



The inferior rim of the orbit is formed by a thick and 

 cylindrical jugal, of which the fore part is dilated into an 

 oblong plate, which partly closes the orbit in front. 



The fossa temporalis is rather deep, of a roundish form, 

 but not distinguished by any crest from the rest of the oc- 

 ciput. The zygomatic part of the temporal is shaped like a 

 thick and short cone. Reaching to the orbit it alone forms 

 the zygomatic arch, as in the dolphins. The occipital bone is 

 vertical, and forms all the posterior face of that semicircular 

 wall which is so singular a characteristic of the back of the 

 head. The lower edge of this occipital bone is divided on 

 each side by a notch into two lobes, of which the external one 

 represents the mastoid apophyse. 



OF THE OS HYOIDES. 



When the intestines and other soft portions of the animal 

 were about to be towed to sea, and cast adrift, I desired the 

 men carefully to explore the masses of flesh ; the result was 

 fortunate, for they had not made use of their spades many 

 minutes before they struck against some hard substances in 

 one mass, which, on examination proved to be the parts of 

 the OS hyoides. This organ, in cetaceous animals, is generally 



