72 
The brachio- cephalicus connects the fore-limb with the trunk and 
consists of the anterior part of the trapezius, the cleido-mastoid, 
cleido-occipitalis, and the clavicular part of the deltoid. WINDLE 
and Parsons also include the omo-hyoid and omo-trachelian muscles, 
which occasionally become blended with the former (1). 
We have not paid attention to these latter muscles as we have 
been concerned with the functional groups of muscles rather than 
with their anatomical details. 
The nerve-supply of these muscles is stated in a general manner 
in the monograph just mentioned as coming from the spinal accessory 
and upper cervical nerves, with the exception of the deltoid portion 
of the brachio-cephalicus, which is supplied by the circumflex nerve. 
Our dissections on the human subject have shown us that the 
sternomastoid derives a very variable supply from the cervical nerves. 
It may come from the 2nd or 3rd cervical root ot from a loop between 
the two. This accounts for the discrepancies which are found in the 
statements of various standard text-books concerning the nerve- 
supply of this muscle. 
We have had the opportunity of dissecting the followmg un- 
gulata: 
Connochaetes gnu. 
Cervus canadensis. 
Cervus porcinus 
Gazella dorcas 
Camelus dromedarius 
Dicotyles tajacu. 
The typical arrangement of muscles and nerves in the ungulates 
represensted by the gnu, the wapiti, the hog deer and the dorcas 
cazelle, is the following: 
oO fo) 
The sterno-cephalicus is divided into sternomasseteric and 
sterno-occipital portions. These muscles arise close together from the 
highest segment of the sternum and pass in company up the neck 
towards the head. 
The sterno-massetericus is superficial and is inserted into the 
fascia overlying the masseter. The sterno-occipitalis passes to its 
