AND CLASSIFICATION OF THE FOSSIL REPTILIA. 
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and radius are preserved. The width of the humerus corresponds very well with the 
Swedenborg specimen ; but the ulna in the Munich specimen is 4‘8 centims. long, 
while in the Vienna specimen it is 5 centims., so that the bone should have measured 
in this fossil about 5'5 centims. if the specimen had belonged to Protorosaurus Speneri. 
Hence this animal appears to differ from that species in being longer in the hind-legs 
and shorter in the fore-legs. But I do not venture to suggest for it a distinct name. 
It is interesting, as showing the coracoid and scapula. 
Another specimen, preserved at Freiberg, is figured by von Meyer lx. in T. 2. It 
is of about the same size as the Spener fossil, but only shows cervical and dorsal 
vertebrae, pelvis, scapular arch, and foredimb. The cervical vertebrae are contrasted in 
measurement with the College of Surgeons specimen in the foregoing Table, from 
which it appears that the last two cervicals are relatively longer. Four dorsal 
centrums measure 4’5 centims., which would correspond with the length in Spener’s 
fossil. The bones of the fore-limb are slender and graceful in outline; and both 
ulna and radius are remarkable for a slight sigmoid flexure and constriction of the 
middle of the shaft. The humerus is 5’5 centims. long; the ulna and radius measure 
4'6 centims., and the foot beyond the carpus about 5 centims. In the Vienna 
specimen the ulna and radius measure about 5 centims., and in the Munich specimen 
about 4 - 8 centims.; and in both are strong massive bones with sub-parallel sides and 
different contours. This character is suggestive of a specific difference ; but, as the 
contours of the humerus are similar, and there is no fundamental difference in the 
form of the coracoid or of the pelvic bones, it seems to me more convenient to group 
the Freiberg fossil with Protorosaurus Speneri till it has been re-examined. It makes 
known the structure of a remarkable type of scapular arch, and gives some valuable 
details of pelvic structure. 
The Berlin specimen, figured by von Meyer l.c. in T. 4, has the femur 8'5 centims. 
long, while the tibia measures 9 centims. This reverses the usual relations of length 
between the leg and the fore-leg, and is probably a good specific character. The 
pelvic bones resemble those in the Swedenborg fossil, but differ in form. The femur is 
as long as six of the early caudal vertebrae. Further evidence is required to determine 
the systematic place of these remains. All the specimens hitherto compared are exposed 
in side view ; but there are two other fossils figured by von Meyer. One, preserved 
at Flan over, shows the dorsal aspect of the dorsal and sacral vertebrae, pelvis, &c.; 
the other exhibits the ventral aspect of the sacrum of a large animal preserved at 
Dresden. The Jugler fossil at Hanover has a femur of a massive oblong form, not 
unlike that in the Vienna fossil, hut relatively much shorter and wider. It is about 
5‘3 centims. long and 2'2 centims. wide proximally, and is equal to the length of 
four dorsal vertebrae. In the Munich fossil the femur is equal to seven dorsal vertebrae, 
and the proportion is nearly the same in the Vienna specimen and in the College 
of Surgeons type. In the Waldenburg specimen, P. Linkii, the femur is as long as 
six dorsal vertebrae. But, although the relative shortness of the femur thus separates 
2 d 2 
