170 Trcmsactions. — Zoology. 



Plate v.— Epiodon chathamiensis. — continued. 



2a. and b. Tootli of the specimen collected by H. Travers. 



3a. and b. Tootli collected by Dr. Buller (nat. size.) 

 Plate VI. — Tympanic Bones. Half nat. size. 



la. and b. Neohalcena marginata, Gray. 



2. Euhalcena australis, Gray. 



3a. and b. Megaptera novce-zealandice, Gray. 



4a. and b. Mesoplodon hnoxi. 



5a. and b. Berardius a7'mtxii, Gray. 



[Note. — 7th February, 1873 — A communication just received from Dr. 

 Gray since the previous pages were pressed enables me to add the following : — 



Macleyius australiensis. 



31. 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 vertebrae 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 Euhalcena australis. 



Berardius hectori. 

 B. hectori, Gray, ''Ann. and Mag. N.H.," 1871, YIIL, 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.] 



