Hector.—On a Variety of Mesoplodon hectori. 87 
dilates to form a dental cavity, in which the tooth is lodged, its tip only 
reaching to the level of the upper edge of the jaw. It occupied the cavity 
loosely, but could not be removed without breaking the bone. The tooth 
(figs. 3 and 4) is a very thin, hollow, conical shell, compressed, but not filled 
with solid dentine as in previous specimens. The tip is smooth and enamelled. 
The height is 1:2 inches; width, 1:0; and its thickness, 0-3. 
The tooth shows the specimen to have been a young animal, and this will 
account for the slightly smaller size and different proportions of the jaw from 
the type; and the posterior, instead of the terminal, position of the tooth shows 
that probably several existed on each side, and that the dental characters in 
this group of whales are not constant or sufficiently important to form the 
basis of specific distinction. At the same time it is interesting to find that, even 
in the young state, this whale has the compressed form of teeth and the same 
mode of their arrangement which obtains in Berardius, to which genus it 
was at first referred.* 
This specimen was found on the beach at Kaikoura, and forwarded to the 
Museum by Mr. J. R. W. Taylor. 
Авт. XVI — List of Seals, Whales, and Dolphins of New Zealand. 
By J. E. Gray, Ph.D., F.R.S., Hon.Mem.N.Z. Inst. 
[Read before the Wellington Philosophical Society, 6th August, 1873.] 
Tur fauna of New Zealand, as regards marine mammalia, is extending, and 
I have no doubt will be found to be much richer as they become more studied. 
For example, we have not yet had the “Sulphur Bottom” or the “Trigger” of 
New Zealand whales, and there are other species mentioned as found in those 
seas, but in such a manner as not to be able to be entered in scientific 
catalogues. There are many more species recorded as inhabiting Australian 
seas, which, no doubt, range as far as New Zealand, but I have only inserted 
these on the authority of specimens. 
1. Stenorhynchus leptonyx.—The Sea Leopard, Gray, Cat. Seals and Whales, 
p. 16; Webb, Trans. N.Z. Inst., IL, p. 29; Fraser, l. с., р. 33. 
Habitat—New Zealand, Port Nicholson (F. Kaga). 
Skull in British Museum. [Skeleton in Colonial Museum] 
Arctocephalus cinereus. —The Grey Australian Fur Seal. Otaria cinerea, 
Perron and Le Sueur; Quoy and Gaimard, Voy. Astrolabe, t. xii., xiii., 
xiv.; Hector, Trans. N.Z. Hob, IV, p. 12, E I (skull) ; not Gray, 
* Trans. N.Z. Inst., Vol. III., p. 108. 
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