Haast.—On Euphysetes pottsii. 99 
Inches. 
Entire length of cranium T ect 13:5 
Greatest breadth of cranium at агі region is 112 
Beak from notch—length sip vi s 5:3 
> breadth at notch es ds Mo Bud 
Length of beak at occipital biis Ext у, 5:5 
Breadth 11 Й у iva 6:8 
From these measurements it will 2 seen that the beak is shorter than 
broad, but not quite so much truncated and blunt as Gray’s whale. 
However, the most characteristic feature in the skull is the non-symmetry 
of the bones, which make it appear at first sight that we have a remarkable 
case of deformity before us. MacLeay has given a masterly description of 
those anomalies, and has shown how, by the great development of some bones, 
such as the right intermaxillary, and by the stunted form of others, these 
striking contortions are brought about, by which that remarkable asymmetry 
is caused, to which I can add nothing, as his description agrees entirely with 
our New Zealand skull. 
The blow-holes are exceedingly disproportionate in size, the right one being 
scarcely the tenth part of an inch in diameter, whilst the left is nearly fifteen 
times as large, of an oblong form, being 1:5 inch long and 1:12 inch broad. The 
rami of the lower jaw are very thin and fragile, and have, like Gray's whale, 
scarcely any condyles. It agrees also with the latter, except in the position of 
the teeth, having thirteen on each side, which are described by MacLeay as 
projecting horizontally and being curved upwards In the New Zealand 
species they have the same slender conical form, but stand out sideways with 
their points curved inward, the last tooth on each side, however, being curved 
forward, its hook nearly touching the preceding one. The two first teeth on 
each side stand nearly perpendicularly to the jaw, whilst the rest incline 
slightly backward, with the exception of the last tooth, which has again a 
perpendicular position. All these teeth fit into sockets on both sides of the 
roof of the mouth provided for their reception in the gums. However, 
these minor deviations would not constitute such a specific difference as to 
separate it from the Australian species, did not the rest of the skeleton present 
Such marked differences. 
MacLeay states that Gray's Ewphysetes has 52 vertebre, but I find that 
there must be some mistake in the enumeration of the different forms of 
vertebrae, because, when added, they only amount to 51, viz. :—7 cervical, 
14 dorsal, 9 lumbar, 21 caudal, of which 13 have chevron bones attached— 
51 together. 
The number of the vertebrze of the New Zealand Huphysetes is one less, 
namely, 50; moreover, they are differently arranged. Its 7 cervical vertebrae 
