202 
PROFESSOR H. G. SEELEY OX THE STRUCT ORE, ORGANIZATION, 
region of Link’s fossil, beneath the humerus, are, as I believe from evidence in the 
British Museum, to be accounted pelvic, then the distinction between the types is 
very marked, and with the other characters would indicate a clirference from Link’s 
specimen of more than specific value. Swedenborg’s type is manifestly more nearly 
related to Spener’s type. If, as before, the comparison is based on the femur, 
Swedenborg’s animal is larger than Spener’s in the proportion of 88 to 71. If, then, 
the dimensions in the latter are augmented by one-fourth, it should give approximately 
the size of the former. Four caudal vertebrae should measure about five centims.; 
they actually measure 5'5 centims. The correspondence is equally close in the 
proportions of the dorsal vertebrae. The chief differences in the cervical vertebrae are 
in form of the neural arches; but in length of centrum the correspondence, bone for 
bone, is exceedingly close between the theoretical measurements and the actual 
measurements. These resemblances seem to me to warrant the identification of the 
Vienna specimen with Protorosaurus Speneri. This determination makes known the 
hinder extremity of that species, the distal end of the humerus, the ulna and radius, 
the carpus, and some portion of the metacarpus. And it shows the complete series 
of dorsal ribs, to the distal ends of which slender sternal or abdominal ribs are 
articulated, two or three in number being placed side by side in connection with each 
dorsal rib. As the remains lie, they give a depth of body in this specimen of about 
10 centims. 
The specimens figured by von Meyer l.c. on T. 6, with the exception of his copy 
from Spener’s figure, all belong to the same genus as Protorosaurus Linkii; but 
whether the species is identical, as would seem probable, I have not made the 
necessary calculations to determine. The Munich specimen, figured by von Meyer 
l.c. in T. 1, fig. 1, though very fragmentary, is sufficiently different in some of its 
proportions to be worth comparison. The cervical vertebras are preserved in sequence. 
They are of the same character as in Protorosaurus Speneri. Their lengths are given 
in the following Table, for comparison, in centims.:— 
1st. 
2nd. 
3rd. 
4th. 
5th. 
6th. 
7th. 
College of Surgeons .... 
1-9 
1-9 
25 
2-4 
2 ' 
1-8 
Vienna. 
2-3 
2-3 
2-8 
2-9 
2-6 
2-3 
Munich. 
•6 
2-0 
2-6 
3Y 
2-8 
2-8 
2-3 
Freiberg. 
2-5 
2-5 
2-3 
22 
From this it is evident that the vertebrae in the Munich fossil do not preserve a 
relation of proportionate length with those of Protorosaurus Speneri. Four dorsal 
vertebrae measure 5'9 centims., which is nearly the calculated length. The femur is 
97 centims. long, has a rounded proximal end, and a slight sigmoid flexure, but is less 
massive at the ends and more slender than in P. Linkii, and not so straight or so 
wide at the proximal end as in P. Speneri. The humerus is imperfect, but the ulna 
