467 



scapular head of the oroo-hyoid ; 2. the occipital portion of the trapezius ; 

 3. the long head of the biceps; 4. the coronoidhead of the pronator teres — 

 this is absent in many Quadrumana; 5. the radial origin of the flexor 

 sublimis, likewise deficient in monkeys ; 6. the outer slips of the extensor 

 digitorum longus and of the brevis in the foot ; and, 7, the tendon corre- 

 sponding to the former in the hand ; 8. the long flexor tendon for the little 

 toe ; and, 9, the short flexor for the same digit ; 10. the sternal head of 

 the sterno-mastoid. 



Mr. Alexander Macalister, Demonstrator of Anatomy, Royal Col- 

 lege of Surgeons, Ireland, also read the following paper : — 



Notes of two Undescribed Ligaments in the Human Body. 



There are some ligaments in the human body, which, although compara- 

 tively distinct, seem to be as yet undescribed by anatomists, as I have 

 sought in. vain for a notice of them in most of the standard works on prac- 

 tical anatomy. One of these structures is connected with the scapula, the 

 other with the hip joint. The first, which I propose to name coraco-glenoid 

 (Plate IV., fig. 1, c), is a flat fasciculus, of varying strength and distinct- 

 ness, which passes from het posterior and external aspect of the coracoid 

 process, underneath and sometimes attached to the coraco-acromial liga- 

 ment, downwards, backwards, and outwards, obliquely, to be inserted 

 into the glenoid ligament, and into the posterior and superior part of the 

 lip of the glenoid cavity ; extending backwards and downwards into the 

 neck of the scapula, in one subject so far as to be continuous with the 

 glenoid attachment of Sir A. Cooper's spino-glenoid ligament. To 

 expose this coraco-glenoid band, we require to detach and throw down- 

 wards the deltoid muscle from its origin, to cut across and reflect the 

 eoraco- acromial ligament; and then, if we divide the supraspinatus tendon, 

 and draw the humerus downwards, and outwards, so as to render the 

 capsule and its coraco-humeral accessory band tense, this structure will 

 be exposed to view. It is connected at its origin with the coraco- 

 humeral ligament, with which its fibres passing from the coracoid attach- 

 ment decussate ; but they are perfectly distinguishable by their difference 

 in direction, as they form nearly a right angle with each other. Its outer 

 border gives attachment to some fibres of the capsular ligament, which 

 rarely I have seen distinctly split by it ; its posterior fibres are often con- 

 tinuous with the periosteum at the root of the coracoid process, or else 

 they may be free along their inner edge. At its insertion it crosses the 

 long tendon of the biceps, with which it is in general partly continuous ; 

 occasionally it is split into two parts — -one extending to the neck of the 

 capula, the other continuous with the biceps tendon. In frequency I 

 have found this structure as constantly present as the spino-glenoid liga- 

 ment, than which it is often much stronger ; and from observations extend- 

 ing over several sessions, I have estimated that in the average of every 

 twenty subjects it occurred very strong in five, weak but distinct in 

 seven, indistinct in five, and absent in three. Its strength I have found 



