42 PROCEEDINGS OF THE GEOLOGICAL SOCIETY. [Nov. 24, 
must have been 20 in. long, if the drawing is correct. Probably 
therefore B was a larger animal, and the length of the shoulder- 
bones of A must be proportionally reduced. The femur of A is 
274 in. long; the tibia about 20 in. long. ‘The ilium of B seems to 
have been not less than 16 in. long. 
In the Maidstone Jguanodon, the scapula is 29 in., the humerus 
is 19 ins., the femur 33 in., the tibia 31 in., the ilium 30 in. long; 
so that the hind limbs were much longer in proportion to the fore 
limbs, the tibia in proportion to the femur, and the scapula in pro- 
portion to the humerus than in the Stuttgart Dinosaurian. The 
hinder dorsal vertebree have centra rather less than 4 in. long, and 
fully 4 in. high, whence Zyuanodon would seem to have possessed a 
shorter trunk in relation to its limbs. 
The associated remains of a Megalosaurus which Mr. James Parker, 
of Oxford, was good enough to show me some time ago has ilia which 
are 26 inches long, femora 32 inches; and the tibie could not have 
been much shorter than the femora. Scelidosaurus has the iliuam 
16 inches long, the femur 16-17 inches, the tibia 13 inches, the 
scapula 13 inches, the humerus 11-25 inches. The length of a dor- 
sal vertebra is 24-23 inches. Thus, in the proportions of the tibia 
to the femur and of the humerus to the femur, the Triassic reptile 
comes nearer to the Liassic Scelidosauwrus than any other Dino- 
saurian; but the limbs are shorter in proportion to the vertebra 
than they are even in Scelidosaurus. 
The facts now detailed show that, as I have already hinted, for 
the last ten years ample evidence of the existence of at least two 
genera of Dinosauria in the German Trias has been in existence. 
But in 1861 Von Meyer described and founded the genus Terato- 
saurus upon a left maxilla with teeth, which he declared to be distinct 
from Belodon, and to have, in all probability, belonged to Plieninger’s 
Pachypode. This sagacious suggestion receives the strongest sup- 
port from the subsequent discovery of the maxilla of Megalosaurus*, 
which is extremely similar to that of Teratosawrus in all its impor- 
tant features, though, in some minor details, the two are sufficiently 
different to enable them to be clearly distinguished. Hence I think 
that, until evidence to the contrary appear, it will be well to adopt 
Von Meyer’s suggestion, and speak of the skeletons as well as the jaw 
under the name of T’eratosaurus. 
In the course of his memoir (p. 415) Prof. Plieninger refers to 
the discovery of the remains of a large reptile in the Upper Keuper 
near Basle by Prof. Gressly, and states that he has reason for identi- 
fying it with his Belodon (i. e. Teratosaurus). 
2. Dinosavria from the Trias of Britain. 
I had got thus far in accumulating evidence of the existence of 
Dinosauria in the Trias of Europe, when, looking through the 
memoir by Riley and Stutchbury on the Saurian remains from the 
Bristol conglomerate, I was struck by the resemblance which some 
of the bones they figure present to those of Dinosauria. Most 
* See Quart. Journ. Geol. Soe. vol. xkv. p. 311. 
