106 Dr. J, Hector on the Whales and 



Skull : Chatham Islands (coll. G. H. Travers). 

 Weight of teeth 817 and 836 grains. 



inches. 



Total length 36 



Width at orbits 20 



„ notch 12 



Length of beak 18 



„ brain-cavity 6 



„ sperm-cavity 12 



„ lower jaw 30 



Height of ramus 7 



The beak is trigonal, three times as long as the brain-cavity 

 measm-ed internally. The vomer is not observed in the profile 

 as in Petrorhynchus capensis ; otherwise the general structure of 

 the skull agrees with that species. The teeth are ground down, 

 each with two lateral facets and a central ridge ; as these 

 teeth, when the mouth is closed, are beyond the lower jaw, 

 there is probably a callosity on the upper lip against which 

 they are applied. 



Two teeth of another individual are in the museum, with 

 triple facets. 



This species may be the same as Epiodon australis^ Burm., 

 of which I have no description. 



14. MesopJodon Layardii. 



Lower jaw with teeth : Chatham Islands (coll. G. H. 

 Travers). 



Total length 33 inches ; symphysis one third of total length. 

 Hinder edge of the teeth is 1 8 inches from the condyle ; and 

 their length along the jaw is 5 inches, the anterior margin 

 being in advance of the commencement of the symphysis ; no 

 notch on the edge of the jaw posterior to the teeth. The teeth 

 are 6 inches long, 3 inches wide, and | inch thick. The acute 

 point in the upper and forward angle is very marked ; there is a 

 deep rough notch w^orn on the anterior margin ; and the com- 

 pressed root of the tooth shows seven distinct fangs. The teeth 

 are directed obliquely backwards and inwards, but do not 

 approach so as to close over the beak, as described in the type 

 of the species (Cat. Seals & Whales, p. 353). 



15. Berardius Hectori^ Gray. (Scamperdown Whale.) 

 Berardius Hectori, Gray, Ann. & Mag. Nat. Hist. viii. p. 116 (August 



1871). 

 Mesoplodon, sp., Flower, Nature, Dec. 7, 1871, p. 105. 



Teeth -. Body fusiform ; head rounded, beaked ; upper lip 

 long and flexible ; eye halfway between angle of mouth and 



