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preserved, this ridge commences immediately behind the head, 
and is traced down the length of the neck, but the back is so 
far worn that it is not clearly seen in the dorsal region In 
the specimen numbered 2, in which only a small part of the 
neck is exposed, the median ridge is traced down about two- 
thirds of the back, but the sacral region and tail are more 
flattened. In the specimen numbered 3, it similarly extends 
down the median line of the back. And in number 4 the ridge 
is indicated apparently in the tail, where there appears to be 
evidence of a median longitudinal division beneath the angle 
of the ridge, owing to the existence of some more durable 
substance in that position. The fragmentary remains also give 
some evidence of this median longitudinal structure Such an 
angle along the neck and back would be expected in the body 
of a Plesiosaur. 
The head in the specimen numbered 1 is bent at an angle to 
the neck in a way which is commonly seen in the embryos of 
reptiles. 
On the middle of the side of the head there was present when 
the specimen was found a scale with a radiated structure, which 
had the appearance of being a sclerotic circle of bones about the 
eye, which, although unknown in Plesiosaurs, is a character 
of some fossil reptiles, like Rhopaloclon. The neck contracts 
behind the head, and then steadily widens along its length 
down to the position in which the fore limbs are given off. 
The neck does not appear to increase in depth so rapidly as in 
width, as though cervical ribs were well developed. It is nearly 
straight in the specimen (No. 1), but makes a small angular 
bend with the back, a character which is somewhat obscured by 
abrasion which the back has undergone. 
Limbs are given off where the body widens transversely 
behind the neck, but in this specimen (1) the fore limb is only 
partially exposed on the left side, so as to show its edge. It 
appears to be narrow, but is evidently small and short, like a 
limb imperfectly developed. 
In the same way the hind limb, which is imperfectly 
preserved on the left side, appears to be shown laterally. The 
neck of another individual is seen passing under the middle of 
the abdomen of this specimen, and this apparently causes 
