interest to determine the presence 
and form of the abdominal ribs, 
if there be such. 
The limbs are remarkably stout 
and short, with prominent rugos- 
ities for the attachment of power- 
The feet are less well 
known, but the form of the known 
carpal and tarsal bones, and the 
shape of the phalanges, indicate a 
loosely knit foot, relatively broad 
and clumsy. ‘The general form of 
the carpal and tarsal bones seems 
to have been similar to that of the 
Pariotichidae and the Pelycosauria, 
though much less perfectly modeled. 
The terminal phalanges are short 
semicircular, covered with 
strong rugosities (see Journal of 
Geology, Vol. XI, No. 4, Fig. 6, p. 
400); it is evident that there were 
no powerful claws, as in the pelyco- 
saurs, but rather broad and clumsy 
ones. The most remarkable feature 
of the skeleton is the presence of 
plates overlying the first five dorsal 
AS@ shown in Bie. =2, the 
first of these is very small, the 
second one far larger, and the suc- 
ceeding three relatively narrow and 
high. They overlie the ribs directly, 
RESTORATION OF DIADECTES 
Empedias, but it seems very prob- g 
able that they were present, both : 
because of the prone attitude of oy 
the animal, and of its probable 5) 
ancestral position as regards the ey 
It will be of the utmost CS 
Sod 
The feet are based on 
Fic. 1.—Restoration of Dzadectes, sp., based on specimen No. 1075, University of Chicago collection. 
1 
6° 
imperfect feet of other specimens. 
