Dolphins of the New-Zealand Seas. 105 



plates united, so as to form the nasal groove into a tube through- 

 out two thirds of its length. 



7. Delphinus Forstert, Gray. 

 A skull in the museum agrees in its dentition with this 

 species. It differs from the preceding species in the greater 

 proportional Avidth of the beak and more perpendicular fore- 

 head, the width of tlie middle part of the beak being con- 

 tained four times in the length from the notch, while in I), novce- 

 zealandice it is six times. 



8. Electra clancida, Gray. 

 The generic character requires to be amended by leaving out 

 the second dorsal lobe, which is not present in this species. 



9. Pseudorca meridionalis, Flower. (Tasmanian Blackfish.) 

 An imperfect skull found in Lyall Bay appears to belong to 

 this species. 



10. Grampus Bi'chardsoni, Gray. 

 A lower jaw found on the Mimawutu beach agrees with 

 this, except that it has only three instead of four teeth on eacli 

 side. 



11. Beluga Kingii, Gray. 

 A very imperfect skull, in the collection of the late Mr. 

 Swainson, appears to resemble this species. A large white 

 Porpoise is frequently seen at certain seasons in Blind Bay, 

 and may be this species. 



12. Glohiocephalus macrorhynchus^ Gray. 

 (New-Zealand Blackfish.) 

 Several skulls, move or less perfect, are in the museum, one 

 from the Chatham Islands. 



The same trivial name (Blackfish) is also applied to a 

 small species of Sperm-Whale. 



13. Epiodon chathamiensis, sp. nov. 

 Beak of skull tapering, callous, with a slight upward curve. 

 Vomer forming a posteriorly truncate callous ridge, depressed 

 between the intermaxillarics. Upper jaw toothless. Lower 

 jaw elongate, bent up, truncate, with two terminal, short, sub- 

 cylindrical teeth in shallow sockets, and in front of a long 

 dental groove. 



