816 MR. J. B. PERRIN ON BALENOPTERA ROSTRATA. [ Dec. 6, 
This arrangement differs somewhat from that described by Carte 
and Macalister. 
There was no palmaris longus. 
The suprascapular ligament is triangular in shape, 2} inches 
long, and attached by its base to the upper border of the scapula, 
reaching as far outwards as the coracoid process. The omo-hyoid 
muscle is attached to the whole length of this ligament. 
The suprascapular notch was oval in shape, the long axis of the 
ellipse running parallel with the supraspinatus muscle, measuring 
2 inches ; its vertical axis measured 14 inch. It transmitted the 
large suprascapular nerve, and was closed in posteriorly by the 
supraspinatus muscle. 
The Scapulo-humeral Articulation.—This articulation is a perfect 
enarthrosis, provided with a complete capsular ligament, stronger on 
the ventral than the dorsal aspect of the joint. It is not perforated 
by the tendon of the subscapularis muscle, as described by Carte 
and Macalister in their specimen. Although the tendon of the 
subscapularis lies in close contact with it, it could be readily de- 
tached by careful dissection, without any appearance whatever of 
perforation. 
The capsular ligament was strengthened on its dorsal aspect by a 
strong ligamentous band, which was attached proximally by a broad 
expansion to the margin of the glenoid and the adjoining surface of 
. the base of the coracoid; from this wide attachment the ligament 
rapidly narrowed to a strong and thicker band, about one quarter of 
an inch wide, which passed across the capsular ligament to be in- 
serted into the humerus immediately to the ulnar side of the infra- 
spinatus tendon, and behind the tendon of insertion of the deltoid. 
This articulation has a large and somewhat loose synovial membrane, 
which could be readily demonstrated by dissection. 
From the ventral aspect of the capsular ligament a strong ten- 
dinous process, about an inch and a quarter wide, arose, passing 
behind the subscapular muscle, and joined the upper fibres of inser- 
tion of the teres major muscle (fig. 2, P#). No distinct muscular 
fibres could be detected in this fascial process, though it is evidently 
homologous to a peculiar muscle which is occasionally found in the 
human subject. 
The humero-cubital articulation is formed by the direct apposi- 
tion of the slightly convex and transversely flattened distal extremity 
of the humerus with the flattened and but slightly concave proximal 
ends of the radius and ulna, the latter bone having on its postaxial 
border its cartilaginous olecranon prolonged backwards on to the 
humerus somewhat beyond the remainder of the bone. There was 
but very slight movement in this articulation, the greatest extent 
being allowed at the point of the recurvation of the olecranon, and 
the direction of the movement from before backwards. There is a 
distinct synovial membrane, though extremely thin, but capable of 
demonstration, especially at the postaxial side of the joint, where the 
greatest movement was found. There seem to be no distinct and 
separate ligaments, the place of the latter being supplied by the 
