1909.] ANATOMY OF CERTAIN UNGULATA. 175 
speak of one of the fetal brains, and in that there certainly was 
this continuity. Furthermore, on one side of the same brain 
(the right—I cannot say anything of the left) the crucial sulcus 
was continuous with the coronal. 
Muscular Anatomy.—\ have dissected some of the muscles of 
one of the foetal specimens of Antilocapra, and have compared my 
dissections with the comprehensive account of Ungulate myology 
of Messrs. Windle & Parsons *. The latissimus dorsi cannot be 
said to be a feeble muscle in this Ungulate. Its origins are, as 
usual, in common with the trapezius and behind and contiguous 
to that muscle from the spines of some dorsal vertebre, from the 
lumbar fascia covering over the longissimus dorsi and ilio-lumbaris 
muscles, and from three ribs nearer to their ventral than to their 
dorsal ends—from the sides of the thorax in fact. A little way 
down the scapula the muscle diverges from the trapezius and 
passes under the broad triangular scapular head of the triceps to 
reach the humerus. Just at this region it gives off a feebly 
developed dorso-epitrochlear branch to the elbow, and is connected 
with the teres major, in common with which it is inserted. Here 
also the panniculus carnosus is attached to the latissimus. 
The rhomboidei are, as is usual in Mammals, two in number 
and composed of a more superficial and a deeper-lying muscle. 
The superficial is the more anterior of the two, but only covers 
the deeper-lying part of the muscle anteriorly. Its fibres are also 
more antero-posterior in direction than those of the other. The 
insertion to the edge of the cartilaginous supra-scapula commences 
in contact with and posteriorly to the supraspinatus anteriorly, 
and posteriorly ends a quarter of an inch or so in front of the 
posterior commencement of the insertion of the serratus. These 
two muscles, therefore, form a nearly complete semicircle (or 
rather, semiellipse) of insertion on to the supra-scapula. 
The serratus, as already mentioned, is quite contiguous ante- 
riorly with the superficial rhomboid and arises from eight ribs, 
the latissimus dorsi immediately following from the three ribs 
which lie behind those eight. Its insertion on to the scapula is 
both in front of and behind that of the rhomboidei. 
The clavicular portion of the deltoid forms part of the great 
Ungulate cephalo-humeral muscle. The spinous portion arises, 
as in other Ungulates, not only from the spine of the scapula, but 
also from the fascia covering the infraspinatus. 
The subscapularis is fairly extensive. It arises from and covers 
the greater part of the ventral surface of the scapula. There is 
a very small gap left between it,and the semicircular insertion 
of the serratus and rhomboidei. Anteriorly, however, a portion 
of the subscapularis is somewhat distinct from the rest of the 
muscle and leaves a tract of bone, not long, between its origin and 
the insertion of the rhomboideus. 
The supraspinatus extends over on to the ventral surface of 
* P, Z.S. 1901, vol. ii. p. 626, and P. Z. S. 1903, vol. ii. p. 261, 
