PROFESSOR WOOD ON THE NECK- AND SHOULDER-MUSCLES. 
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sidered as a variety of the omo-hyoid, levator anguli scapulae , or scalenus anticus ; and 
implying apparently that it may be referred to the sterno-cleido-mastoideus. 
In 1866 Mr. A. Macalister describes it, in a spare female subject, as inserted under 
the trapezius into the outer third of the clavicle (op. cit. p. 7). 
Besides the foregoing fully formed specimens of the muscle, we have repeatedly found 
imperfect slips from the cervical attachments of the levator anguli and anterior or poste- 
rior scalenus , which were inserted below into the axillary fascia behind the clavicle. 
Through these slips we travel towards and meet with those which I have before 
described in connexion with the levator anguli and serratus magnus , and thus we have a 
series of transitional forms intermediate between the levator claviculoe and the occipito- 
scapular muscles. Specimens of this kind have also been recorded by J. F. Meckel, viz. 
a slip passing from the levator anguli to the second rib, where it was connected with the 
serratus magnus. He adduces it as an index of the more complete blending of these 
muscles in the lower animals (Archiv, viii. S. 585, and Muskellehre, 1816, Bd. ii. 
S. 402). He also quotes J. C. Rosenmuller for a specimen in which a slip of muscle 
passed from the transverse process of the atlas to the serratus magnus (De nonnullis 
musculorum corp. hum. varietatibus, Leipzig, 1814, S. 5). Kelcii saw, in a female, a 
tripartite division of the levator anguli scapulae , the middle slip sending off from its 
hinder border an insertion into the scapulo-thoracic fascia (op. cit. xxv. S. 33). 
More recently, Mr. Flower and Dr. Murie found, in a Bushwoman, a slip proceeding 
from the levator anguli scapulae to the axillary surface of the serratus magnus , which 
they considered to be an indication of the levator claviculoe muscle (Journal of Anatomy 
and Physiology, No. 2, May 1867, p. 199). 
The first beginning of a differentiation of the fibres of the levator anguli scapulae we 
have not unfrequently found as a double muscle. It is thus figured in Cuvier and 
Laurillard’s plates of the muscles of the Negro, the anterior division being described 
as the homologue of the “ acromio-traclielien'' 1 of the lower animals. Macalister has 
also found this muscle double (op. cit.). 
Cleido-occipital Muscle. — Under this name I described, in a paper published in the 
‘Proceedings of the Royal Society’ in June 1866, an abnormal human muscle placed 
along the hinder border of the sterno- and cleido-mastoids, from both of which it is sepa- 
rated by a more or less wide areolar interval, and sometimes joining, above or below, the 
fibres of the trapezius. Its width is from half an inch to an inch and a half, most com- 
monly being about three quarters of an inch. It is made up of parallel muscular fibres, 
attached above to the superior curved line of the occipital bone by a thin muscular 
aponeurotic termination between the occipital attachments of the sterno-mastoid and 
trapezius muscles. Below it is connected with the back edge of the clavicle about its 
middle third, extending, when large, nearly or quite to the insertion of the trapezius, 
diminishing much the size of, and crossing or covering in the posterior triangular space 
(Plate IX. fig. 9, c ). It is distinguished from the cleido-mastoid by its superficial position, 
by the more oblique and more backward direction of its fibres, and by its attachment to 
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