360 
the long head of the M. coraco-brachialis, WILDER and GAGE!) state 
as follows: “Of the cases observed by us no two were alike. The 
fleshy portion usually leaves the short head at about its middle and 
is 2—3 cm long. Its tendinous continuation is sometimes filamentary 
and disappears among the intermuscular fascia; sometimes it is larger 
and divides, one portion joining the tendon of the epitrochlearis and 
the other inserting upon the humerus near the Fm. epitrochleare; 
more often this last is the only attachment, but the precise point 
varies so much that the area which was observed in one case is in- 
dicated on Fig. 71 by an interrogation point” ?). 
It is evident that this description of the long head of the M. 
coraco-brachialis, in no sense, except perhaps in the origin of the 
muscle, coincides with that given above for the M. coraco-olecranalis ; 
while the circumstance alone that the latter muscle is inserted into 
the olecranon, precludes the possibility of its being the long head of 
the M. coraco-brachialis in the usually accepted sense of the word. 
It may prove an open question, however, on the ground that the 
insertion of the long head of the coraco-brachialis being so prone to 
variation, whether the muscle described by the writer as the coraco- 
olecranalis may not represent another instance of this variability and, 
in reality, be the long head of the M. coraco-brachialis. If this be 
the case, however, what interpretation shall we then put upon that 
muscle described as rarely occurring in man by GRUBER, MACALISTER, 
Le DousLe and others, which arises from the coracoid process and 
is inserted into the olecranon with the triceps? It is evident that if 
the so-called M. coraco-olecranalis of the cat described above is, in 
reality, a long head of the coraco-brachialis which has made an ano- 
malous attachment to the olecranon, there can be no consistent reason 
for assigning any other interpretation to the M. coraco-olecranalis, 
sometimes met with in man. 
What are the real facts as to this so-called M. coraco-olecranalis 
of the cat, it is impossible to definitely state, but it appears to the 
writer, from the data at hand, that it is a muscle entirely independent 
of the long head of the coraco-brachialis. 
Princeton, N.J., U.S.A. 
February, 1900. 
1) Wırper and Gace, Anatomical Technology, Fourth, from the 
Second revised Edition, p. 252. 
2) This point, so far as the writer can make out, is on the humerus, 
below the epitrochlear foramen. 
