Haasr.— Notes on Skeleton of Epiodon nove zealandiz. 487 
This division is still more conspicuous in the ninth or last thoracic ver- 
tebra, where the metapophysis has nearly the same form as that on the 
first lumbar vertebra, with the exception that its upper surface has a 
rounded instead of a horizontal edge. The lower transverse process has a 
more depressed, flattened form, moreover it is situated not only in the 
centre of the body of the vertebra, but also lower down and nearly on the 
same level as the same process in the first lumbar vertebra. 
The bodies of the vertebrae gradually increase in size, the first having an 
antero-posterior length of 1:65 inches, and the ninth or last of 4-10 inches. 
The inferior surface of the first thoracic vertebra is rough and rounded. 
The second, third, and a small portion of the anterior part of the fourth, 
have a shallow concave groove, after which on the fourth a median keel 
appears, which continues to run along the rest, gradually becoming more 
pronounced. 
Lumbar Vertebra. 
The nine thoracic vertebre are succeeded by eleven lumbar vertebree, 
which possess nearly all the same form, getting of larger dimensions as they 
follow each other, so that the body of the last is the largest, viz., 5-48 
inches for the first, and 7:58 inches for the last lumbar vertebra. The 
spines are of considerable size, the first being 18:25 inches high along its 
posterior margin. They then gradually rise to the eighth, which is 15:52 
inches high, after which they diminish again slightly. They are compressed 
as usually and broader at the apex, which has a truncate form as if they 
were cut off. 
'The metapophysis on the anterior end of the arch is similar in form to 
that of the last thoracic vertebra, but a little larger in the first four verte- 
bre, its apex having moreover a still more truncated edge. Beginning with 
the fifth vertebra, this process gets gradually smaller, assuming at the same 
time a more rounded form. 
They all possess on their inferior surface a median keel, which is most 
pronounced on the fifth, sixth, and seventh vertebre, after which getting 
shallower by degrees it nearly runs out on the last. The lower transverse 
process is throughout of the same form and size, having a horizontal and 
. little forward direction. 
The caudal vertebra are nineteen in De; of which the first ten have 
chevron bones attached to them on the posterior border of the lower sur- 
face, thus forming as usual two distinct classes. The bodies of the caudal 
vertebre shorten from 7:51 inches to the tenth, which is only 3:78 inches 
long, although their height is the same. From the first to the thirteenth a 
broad shallow groove runs along their lower surface, after which they have a 
deep lateral excavation. The spines are also gradually reduced in height 
