456 Transactions.— Zoology. 
2. That the skull of one of the sexes (probably the female) is longer but 
narrower and lower than that of the opposite (probably the male) sex, which 
latter possesses also a large triangular compressed tooth rising above the 
«gums, which in the latter (probably the female) sex is much smaller and 
always hidden below the gums. 
9. That both sexes of this genus possess permanently in the upper jaw 
a row of small conical teeth with the apex slightly incurved inwards, which 
although only rooted in the gums have to perform important functions in 
the nourishing process of the animal. 
Further notes on Oulodon grayi. 
Iw continuation of my former paper on the interesting genus Oulodon, it 
will be seen from the following notes that the presence of a row of small 
teeth in the upper jaw is of a constant character in this new genus, and 
unless it is shown by further researches that other species belonging to the 
genus Mesoplodon have similar rows of small teeth, and of a permanent 
character in the upper jaw, I think that the genus Oulodon ought to be 
maintained in the nomenclature of the Ziphioid Whales, as being distin- 
guished by that peculiar feature, which as far as I am aware no other 
Ziphioid Whale possesses. 
Sinee I had the pleasure to lay the description of the three skulls ob- 
tained on the Chatham Islands before the Society, four specimens belonging 
to the same ziphioid genus, and which with our local fishermen goes under 
the name of Cowfish, have been stranded on the coast near Saltwater Creek, 
about 30 miles north of Banks Peninsula. One of them, a small male (A), 
about 18 feet long, was washed ashore on the 15th December, 1876. 
On the 29th December another male, 12 feet 9 inches long, was stranded, 
together with a female (D) 17 feet 6 inches long, on the beach a 
short distance north of the entrance of Saltwater Creek estuary, whilst 
another male (C) 18 feet 8 inches long, ran the same day into that small 
estuary, and was left high and dry by the receding tides. As I was fortu- 
nate enough to obtain two of these skeletons complete, I shall be able to 
send one of them to my friend Professor H. J. Flower, as a type specimen, 
and for description, and therefore leave any osteological details to that dis- 
tinguished anatomist. Although the bones are not yet quite macerated, I 
may, however, state that the female, exceeding by nearly four feet the 
largest male obtained, is a full grown animal, whilst the three males are 
allimmature specimens. I measured the length of its lower jaw, and find 
that it is 2 feet 8:50 inehes long, consequently nearly one inch longer than 
the lower jaw of the dried skull, No. 1, which I assigned to a full-grown 
female, and with which it bears a close resemblance, 
