Macalister — On the Anatomy of C/iceropsis Libcriensis. 497 
of the trapezius. There is no cleidomastoid nor omohyoid. Of these 
protractors, the sterno-mastoid = 1 ; trapez us = 2*20 ; trachelo- acro- 
mial = 1*10 ; and the cleido- occipital + clavicular deltoid = 2'50. 
The rhomhoideus occipitalis and major were large, the minor 
small, but they were not definitely separable, and the whole exceeded 
the sterno-mastoid in weight by |th. The latissimus dorsi arose from 
the three lowest ribs, from the spines of the hindmost eight dorsal 
vertebrse, and by the lumbar fascia from the lumbar spines ; it was 
inserted along with and partly connected to the teres major (which 
was normal, and was only j of the latissimus). These two muscles in 
weight exactly equalled the combined cleido- occipital, clavicular deltoid 
and the trachelo -acromial. 
The pectoralis major consisted of: 1st, a quadrate presternal part, 
whose fibres passed from one side to the other into the fascia of the arm 
for the whole length ; 2ndly, of the usual ste mo-costal part, which ex- 
tended to two inches of the linea alba, was large and inserted as usual, 
higher up into the head of the humerus ; this muscle equalled in bulk 
all the neuro-scapular muscles together. There was no proper pecto- 
ralis minor. The serratus magnus arose from ten ribs, and its levator 
anguli scapulae extension, which was as usual inseparable, arose from 
six cervical transverse processes. This muscle equalled the pectoral 
in weight. A strong sterno-scapularis stretched from the pre- 
sternum to the fascia above the supra-spinatus, by which it was 
continued into the meso-scapula ; this muscle equalled the trachelo- 
acromial in size. 
The deltoideus arose as a continuous muscle from the spine of the 
„ scapula and from the infra- spinous fascia, and was inserted into the 
deltoidal crest ; this muscle was small, only half the size of the sterno- 
scapularis. The supra-spinatus was to the infra- spinatus as 14 : 9, 
and the tendons of both lay outside the capsule of the joint. The 
supra-spinatus was more than double the deltoid in weight, and the 
sub-scapularis was very little larger than the last-named. A sub- 
scapularis secundus could easily be separated. 
The coraco-brachialis was represented by the long form, which was 
crossed, not pierced by the musculo-cutaneous nerve ; this muscle was 
small but extended nearly to the inner condyle. The teres minor 
was distinct as usual, half the size of the coraco-brachial and ^ that 
of the infraspinatus. 
The biceps arose by a long tendon from the summit of the glenoid 
cavity ; this tendon was very thick, and ended in a penniform belly, 
which was inserted by two tendons, one into the anterior and inner side 
of the head of the radius, and the other winding round the head of the 
radius ran into the inner lip of the lesser sigmoid cavity of the ulna, 
becoming confluent with the orbicular ligament, a slip extends from 
the latter insertion into the fascia of the forearm. The biceps withal is a 
small muscle, being only equal to ^ of the supra-spinatus. The brachi- 
alis anticus is very spiral in its course, and is inserted into the inner 
side of the radius below its head, anterior to the first tendon of the 
