502 0. C. Marsh—New Jurassic Reptiles. 
form and proportions of the various elements of the fore limb 
are shown in Plate III, figure 1. 
The pelvic arch is quite unlike any hitherto described. In 
its general form the ilium resembles that of Morosaurus, but the 
proportions are reversed. The massive portion in the present 
genus is not in front, but behind, as the ischium is larger than 
the pubis. The relative position and form of the elements of 
the pelvic arch are shown in the figure below. 
Pelvic arch of Camptonotus dispar, Marsh; side view, one twelfth natural size. 
a. aceta i ; 
um; @. ilium; 7s. ischium; p. pubis; p’. postpubis. 
slender, and shorter than the tibia. The astragalus and calca- 
neum are distinct. The second row of tarsals contains but 
two bones. The first digit in the pes was rudimentary, and id 
not reach the ground. The second, third and fourth were well 
developed. The fifth was entirely wanting. The number of 
phalanges, beginning with the first digit, was 2, 8, 4,5. The 
structure of the hind limb and foot is well shown in Plate II, 
figure 2, which is taken from the same skeleton as figure 1. _ 
Some of the principal measurements of the present species 
- are as follows: 
ane 4° 
eter of posterior articular face... 41° 
cervical vertebra 64. 
ee ad 
