A. brachyrhynohus, left 
Bcapula, about } natural 
size. 
4,4 THE STRUCTURE AND RELATIONSHIPS OF ANCODUS. 
exceedingly circular outline .s is seen in the figured scapula j the coracoid process 
17L p4ect much and was reonryed in the same charactensfe manner On the 
^ ^ outer margin of the neck, however, where I found a deep 
fossa in Dip/o^us, the scapula from Puy presented only a flat- 
tening.” (No. 3, p. 32.) _ 1 1 Va 
In A. brachyrhynchus the scapula is relatively much 
higher and narrower than in Diplopus, or even than in Ano- 
plotherium, and is proportioned very much as in Oreodon. 
The neck is narrower and more slender than in Diplopus, 
and there is a more distinct coraco-scapular notch ; the spine 
is not so high or so thick, the acromion much shorter, not 
extending so near to the glenoid cavity, and the coracoid is 
much smaller. The coracoid border forms a thin edge and 
curves convexly forward and upward from the coraco-scapu- 
lar notch. The glenoid border is nearly straight and some- 
what elevated and thickened; its divergence from the neck is 
at a moderate angle. The suprascapular border is also nearly 
straight, and curves gently into the coracoid border, while 
making an acute angle with the glenoid border. The general form and proportions 
of the blade thus approximate quite closely to those which we find in the rumi- 
nants, and depart in a marked way from the type of scapula which Kowalevsky 
has described from Eonzon. 
As in the primitive artiodactyls generally, the spine is placed almost in the 
middle of the blade, which is thus divided into pre- and postscapular fossm of nearly 
equal width. The spine terminates well above the glenoid cavity; it is high, but 
compressed and thin ; the acromion is short, not overhanging the neck very far, nor 
descending to the level of the glenoid cavity, and ends in a roughened tubercle. 
The glenoid cavity, which in AnoplotJierium is very oval, departs very little from 
the circular form, the antero-posterior diameter only slightly exceeding the trans- 
verse. The articular surface is a shallow concavity. The coracoid is a large, corn- 
pres.sed and prominent tubercle, but not hook-like or recurved. The scapula of 
Oreodon agrees with that here described in every particular except size, while the 
differences from that of the European species of Ancodus are obvious. 
The humerus (PI. XXIV, fig. 5) differs considerably from the one which Kowa- 
levsky has figured as belonging to Diploptis, and more resembles that of Oreodon. 
The head is rather prominent and convex and projects quite strongly backward, 
the external tuberosity is very large and massive, rising far above the level of the 
head, and extending across the whole anterior face of the bone ; its internal end 
forms a short, blunt hook, which overhangs the broad bicipital groove rather more 
Th^Zn tuberosity is small and compressed, but rugose. 
has a great antero-posterior diameter, 
taw upon the shaft. The drstal part of the shaft is transversely expanded and 
