27 
from surface abrasion. Measured in length, the neck is about 
2/oths of an inch long, and the body and tail are together 
about joths of an inch longer. 
As preserved they extend in a semi-ovate curve, which embraces 
more than half the circumference of the concretion. The neck 
appears to be proportionately about as long as in the specimen 
No. 1, but its base does not seem to be so wide, nor is there 
any sharp definition of its substance from the body of the 
individual which is supposed to overlap it. This however 
might be due to conditions of preservation ; and the curvature 
between the neck and the limb at the shoulder on the left side, 
is a similar concavity. As already remarked the median 
longitudinal ridge is manifest down the back, which is convex 
in length, and convex from side to side. Its inferior lateral 
margin is rounded as in the specimen No. 1, and the under 
surface appears to be similarly flattened, so that the depth of 
the body is not more than JJths in its wide hinder part, where 
the width is Jotlis of an inch. The tail is similarly short, a 
median ridge extends down it like that on the back, it has a 
triangular form, and terminates in a point. It is bent towards 
the right side, and the body of the specimen rests upon and 
partly covers the left side of the body of the specimen No. 4. 
The hinder limb on that side is not seen ; and on the right 
side it appears to be imperfectly developed, or broken away, 
although there is a distinct lateral prominence at the side of 
the tail, which may indicate the budding base of the limb. 
It is not so distinct as in the specimen No. 1, appears to be 
somewhat further backward, and rather smaller. The fore 
limbs are at the sides where the neck joins the body. That on 
the left side is imperfect at its extremity, but is extended 
outward and a little downward, and as preserved is about 
j inch long, as wide at the base, flattened above, and somewhat 
rounded. It appears to consist of a clayey material. The 
other limb on the opposite side is similarly extended. It also 
consists of hardened clay in the centre, of which there are some 
indications by means of difference of colour of two connected 
bodies, with corrugated outlines. The depth of this limb is 
greater, but its width is much less than that of its fellow on 
the opposite side. A concave curve of distinctly defined skin- 
