494 Bulletin American Museum of Natural History. [Vol. XXXIV, 
they no longer fit together, shows that the distal end of the femur had a 
slight curvature and the turning characteristic in Parasuchia. The tro- 
chanter quartus is relatively well marked and the thick head is only very 
little expanded, not even quite so much (and straighter) as in Rutiodon 
manhattanensis von Huene. The length of the greater fragment is 31 cm. 
The original complete length was probably, approximately, 40 cm. 
Tibia: There are three pieces of the tibia, the head of probably a left 
bone, a small bit of the shaft and the distal extremity of a right tibia. The 
last had been taken by Cope for the distal end of a fibula. The diameters 
of the head are 11 cm. and 7.3 cm.; the shaft 12 em. below the head has 3.2 
and 4.5 em. diameter. That shows a relatively thick head and thin shaft, 
\ f 
wy Yip SE iy 
13 
Fig. 13. Episcoposaurus horridus. Proximal end of right (?) tibia, medial and upper 
view. 4: (Type: Cope, l. c. 1887, p. 216.) 
Fig. 14. EHpiscoposaurus horridus. Distal end of right tibia; a lateral, b lower view. 
4 (Py pe: Cope, 1. C. 18387; py 2iG. +> -Ribula:’”’) 
(Fig. 13), which is very different from Rutiodon manhattanensis and also R. 
carolinensis. The contour of the articular face resembles that of a bean; 
at the slightly concave side of it the shaft is flat or even slightly concave 
in its beginning; the opposite side is strongly convex. The latter is the 
medial, the former the lateral side. I take the bone as a right one, because 
one of the short sides of the head (the posterior one) is projecting from the 
shaft a little more than the other one (the anterior). 
The distal end of the same right tibia (Fig. 14) shows a character not 
yet well knojwn in Parasuchia, the division of the distal end into two pro- 
cesses, the posterior one going straight down, the anterior and shorter one 
