IGG Transactions. — Zoology. 



which I have not seen. Except in the upward curve of the beak, and the 

 less development of the vomerine callosity, this skull resembles Petrorhynchus 

 capensis, Gray, I.e. 345*. 



Since the above was written I have examined the skull of a very old female 

 specimen of this whale, captured in Port Cooper, the complete skeleton of which 

 is being prepared in the Canterbury Museum ; it has the same measurements 

 and general form with the Chatham Islands specimen, but the sperm cavity 

 in front of the blow-hole is covered in by a thin callous plate. The teeth at 

 the extremity of the lower jaw were nearly absorbed, being reduced to 

 conical fangs, with rough surfaces, having constricted sub-cylindrical summits 

 terminating in short acicular tips, and were so deeply imbedded in the gums 

 that their presence was overlooked until after maceration. 



Dr. Haast informs me that the length of this whale was 28 feet, and 

 that it had no dorsal lobe. The colour was black above and white beneath, 

 but the back and sides were marked with oval spots 2 to 3 inches across, 

 like the skin of a leopard. 



The rostrum of an individual of this species, found at Lyall Bay, near 

 Wellington, having a less upward curve, is in the Colonial Museum. 



DOLICHODON LAYARDII. 



Scamperdown "Whale. 

 D. layardii, Gray, I.e. 353. Mesoplodon, Flower, I.e. 



PL III. 



Teeth 2, on sides of lower jaw, strap-shaped, produced, arched, obliquely 

 truncate at the end, with a conical process on the front of the terminal edge. 



Lower jaw, Chatham Islands, obtained by Mr. H. Travers. 



The total length of this jaw is 2 feet 9 inches ; the posterior third is thin, 

 convex externally, expanded, having a height of 6 inches. It is then straight, 

 and compressed in its middle third as far as the commencement of the 

 symphysis, which unites the 7'ami for their anterior third into a straight 



* The following is the manner in which the Ziphid Whales should be grouped accord- 

 ing to the views expressed by Professor Flower ia a recent paper — "Nature," Vol. V., 

 No. 110, p. 105, Dec. 7th, 1871 :— 



Ziphid Whales. 



I. Genus Hyperoodon, Lacepede. 

 H. rostratus, Wesmael. 

 H. latifrons, Gray. 

 II. Genus Zij)luus, Cuvier. 



Z, cavirostris, Cinaer, 



Z. indicus, Van Beneden. 



Z. (Petrorhynchus) capensis, Gray. 



Z. (Epiodon) australis, Bur. 



Z. (Epiodon) chathamiensis. 



III. Genus Mesoplodon, Gervais. 



M. (Ziphius) sowerbiensis, Gervais. 

 M. (Z.) layardii, Gray. 

 M, densirostris, De Blainville. 

 M. knoxi. 



IV. Genus Berardius, Duvemoy. 



B, arnuxii, Duv. 



