28 
like surface connects it with the lateral contour of the body 
Compared with the fore-limbs of the specimen No. 1, the 
differences are greater than would have been anticipated, hut 
they may result from the different aspect which the limb has 
when exposed horizontally, as compared with the depressed 
condition at the side of the body in the specimen No. 1. 
III. 
The third example is the smallest and most unsatisfactory. 
The head is not seen, and the greater part of the neck is hidden 
under the specimen No. 1, and only about | inch of a neck 
remarkable for its singular compression is exposed. The body 
has the usual antero-posterior curvature ; the tail being bent 
downward rather more sharply than in the examples described ; 
and although the specimen has been fractured in this region, 
the tail appears to be relatively smaller and shorter than in the 
other specimens. The body is convex from side to side, with 
a characteristic median dorsal ridge, and increases in width 
from the neck to about the sacral region. At the base of the 
neck there is a slight transverse expansion on the left side. 
It is similar in kind to the right fore limb in the individual 
No. 2, but is relatively much smaller. There is no corres¬ 
ponding process on the opposite side, so that if this represents 
the budding of the fore limbs they are in a very rudimentary 
condition. Behind this lateral anterior expansion, the body 
contracts, and its transverse measurement does not greatly 
exceed , 3 0 ths of an inch. There is no clearly defined lateral 
border to the hinder part of the body, but as in the specimens 
described it appears to be nearly twice as wide as deep. 
There is no clear evidence of the hind limbs. 
TV. 
The fourth individual is remarkable for its distorted form. 
The head, if it exists, is buried in the matrix, and the neck is 
bent almost at a right angle to the body. It is partly over¬ 
lapped on the left side by the individual numbered 2. The 
supposed neck is 1 /oths inch long as exposed : and this appears 
to be equal to, or longer than the body and tail. The neck is 
exceedingly narrow in front, and widens transversely to 
about f 0 ths inch at the shoulder. The shoulder however has 
