Haasr.—Notes on Skeleton of Epiodon nove zealandim. 489 
Ft. In. 
Third 2 101 
Fourth 8 01 
Fifth Mex nie ed oe ua E 
Bixth cn rst s bs ^ eu B BF 
Beventh  ... nS a a Te ee ee 
Eighth . ... iis RA US at UR MP 
Ninth n s at is "c n BE 
Sternum. 
In the form of the sternum, and of which I add a drawing (Pl. XXIV., Fig.) 
Epiodon nove zealandie shows a well-marked difference from Kpiodon 
australe of Buenos Aires. 
It consists of five distinct segments, of which the first is the largest, 
having a greatest length of 141 inches, with a greatest breadth of 121 
inches. The second, third, and fourth generally diminish in both dimen- 
sions until the fifth, which is the narrowest, but longer than the three 
preceding ones. The dimensions of the fifth are 73 inches in length, with 
a breadth of 6 inches. The first, which possesses a shallow keel in its 
upper portion, has a deep notch above it, and another in the centre of its 
basal portion. Similar fossm exist in each of the succeeding segments, by 
which four median fenestre are formed, gradually diminishing in size, 
having their largest diameter in a vertical direction. 
There are six articular surfaces on each side for the sternal ribs; the 
first near the upper portion of the first segment, the second at the junetion 
of the first and second, the third at the junction of the second and third, 
the fourth at the junction of the third and fourth, the fifth at the junction 
of the fourth and fifth segments, and the last at the posterior ends of the 
two narrow processes, by which the fifth segment terminates. The entire 
length of the sternum, in a straight line, is 8 feet 1 inch. 
A comparison with the sternum of Epiodon australe shows a great differ- 
ence in the form of the segments and of the fenestrz, and, as it appears to 
me when mature, this species would only have four segments instead of five, 
thus agreeing with Berardius arnusii. 
Professor Flower figures, in his excellent memoir on Berardius arnuxii, 
the sternum as consisting of five pieces; but it is evident that the fourth 
and fifth segments are portions of the same bone, although they, from some 
cause, have not yet anchylosed. 
In a skeleton belonging to the same species, which stands articulated in 
the Canterbury Museum, and which has been taken from a full-grown but 
not aged male, the discs on both sides of the vertebræ being not yet anchy- 
losed, the sternum consists of only four segments. The fourth and fifth 
