170 Transactions.—Zoology. 
Plate V.— Epiodon chathamiensis.—continued. 
2a. and b. Tooth of the specimen collected by H. Travers. 
3a. and b. Tooth collected by Dr. Buller (nat. size.) 
Plate VI.—Tympanic Bones. Half nat. size. 
la. and b. Neobalena marginata, Gray. 
2. Hubalena australis, Gray. 
3a. and b. Megaptera novee-zealandie, Gray. 
4a, and b. Mesoplodon knoxi. 
5a. and b. Berardius arnuxii, Gray. 
[Nore.—7th February, 1873—A communication just received from Dr. 
Gray since the previous pages were pressed enables me to add the following :— 
Macleyius australiensis. 
M. australiensis, Gray, “ Cat. Seals and Whales,” 105. 
This is a new whalebone whale to New Zealand, the species having been 
founded on a few bones in the Australian Museum at Sydney. It has now 
been added to our fauna through a skeleton having been sent to the British 
Museum by Dr. Haast. 
The minute description of the cervical vertebre of the British Museum 
skeleton, given by Dr. Gray, leaves no doubt that it is the common Black 
Whale of New Zealand, which I have referred to above as Zubalena australis. 
Berardius hectori. 
B. hectori, Gray, “ Ann. and Mag. N.H.,” 1871, VIIL, 117. 
This is Mesoplodon knoxi of the foregoing list. Dr. Gray mentions the 
skull of an allied form in the Sydney Museum as being Mesoplodon longirostris, 
Krefft. I have already mentioned that the first described skull in the 
Colonial Museum with the deep groove between the thin linear intermaxil- 
laries, occupied by a ligament, is probably only the young condition of the 
skull in the Canterbury Museum which has a solid beak, and it is not improbable 
that the young animal may possess a prehensile upper lip to assist it in 
sucking, and that in the adult state this condition disappears, and the snout 
acquires the acute form—J. H.] 
