MAMMAL-LIKE REPTILES. WHS 
the anterior part of the jaw, and had a large symphysis with its 
fellow. 
The post-cranial skeleton of Titanosuchids is represented by 
two series of bones :— 
The type-specimen of Zitanosuchus ferox (two individuals) : 
neural arch and intercentrum of atlas, vertebree, scapule, cora- 
coid, cleithra, clavicle, three humeri, femur, and fibula. 
A series of associated bones of another genus, comprising 
vertebre, ribs, ilium, humerus, femora, tibia, and skull-fragments. 
The atlantal neural arch is absolutely identical with that of 
the Dicynodont Aannemeyeria, as is the intercentrum. They 
give evidence that the whole ‘complex was similar to that of 
M oschops, as described by Broom. 
The vertebre of 7itanosuchus are all extremely unsatisfactory, 
but seem to be generally similar to those of Tapinocephaloids, 
with longer neural spines and shorter transverse processes ; it is 
just possible that the capitulum and tuberculum were connected 
by a very thin web. 
The other specimen has very high neural spines. 
Certain fragments of bone belonging to the type of Titano- 
suchus suggest the presence of relatively feeble abdominal ribs. 
The scapule are very much weather ed, but are extremely large 
and massive bones, giving no evidence of an acromion. 
The coracoid is essentially identical with that of the Tapino- 
cephaloids, and shows clearly that the precoracoid was excluded 
from the glenoid cavity. 
The cleithrum is a fine bone, nearly 8 centimetres wide and 
2 thick; it has an articular facet for the front edge of the scapula. 
What is almost certainly the lower end of the clavicle is 
represented by an unsymmetrical sheet of bone about 20 em. by 
30 em., which has the root of a powerful process arising from one 
surface just within the edge. There is no other bone in the 
skeleton it can possibly be, and, if it is correctly determined, the 
interclavicle must have Reon an extraordinary wide flat sheet. 
The humerus as figured by Seeley, Phil. Trans. 180 B, pl. xx 
figs. 1 & 2, gives a rather misleading idea of the bone. Tt is in 
essentials much like that of the Tapinocephaloids, but differs in 
its relatively narrower lower end, in having the facet for the 
head of the radius still more on the front of the bone, and the 
two openings of the entepicondylar foramen on the same side of 
the shaft. Finally, there is a small ectepicondylar foramen. 
A single ulnare is present in the material; it is a rather small 
but thick bone with a notch in one border, ‘forming part of the 
ordinary foramen between the ulnare and the intermedium. 
The ilium is very incomplete, but is a short bone, apparently 
similar to that of the Tapinocephaloids. 
The femur differs from that of the Tapinocephaloids in its 
relative slenderness and the lesser size of the trochanter. 
The tibia does not differ essentially from that of Tapino- 
cephaloids. 
