2 i8 A BOOK OF- WHALES 



basirostral groove ; foramina of second division of 



o 



fifth nerve as in M. bidens. Tooth at middle of 

 mandibular symphysis. 



This species is not to be regarded as certainly 

 distinct from the last. The only point, it will be 

 observed, in the above definition relates to the 

 position of the teeth. Dr. Gray, however, erected 

 it into a separate genus, Neoziphius. It is based 

 upon a single individual found floating in the sea 

 at the entrance of the British Channel about 1840. 

 The skull is now in the Museum at Caen. There 

 is really nothing more to be said about this animal. 



Mesoplodon densirostris , Blainville ;* (^Ziphius 

 sechellensis, Gray). Rostrum narrow at base ; 

 basirostral groove present ; foramina for fifth nerve 

 one behind the other. Tooth with vertical apex, 

 near hinder edge of mandibular symphysis. 



This species has been taken at the Seychelles, on 

 the coast of South Africa, and at Lord Howe's Island. 

 The species is based upon a skull and the skeleton 

 of another animal. 



Mesoplodon grayi, Haast.t Rostrum narrow at 

 base ; basirostral groove present ; foramina of fifth 

 nerve one behind the other. Tooth vertical, near 

 hinder end of jaw symphysis. 



* Nouv. Diet. Hist. Nat., 2nd ed., t. ix., p. 178. 

 t Proc, Zool, Soc., 1876, p. 457. 



