1897.] NEW YORK ACADEMY OF SCIENCES. 353 



7. Scapular Muscles. 

 (PI. XXX., fig. 2 ; PI. XXXr. and PI. XXXII., fig. 1.) 



A. M. SUPRASPINATUS 



Is a strong bipenniform muscle, covered by a dense fascial 

 aponeurosis. 



Origin: Medial three fourths of supraspinous fossa and of 

 deep surface of investing aponeurosis; along the cephalic border 

 of the scapula the adjacent margins of the Supraspinatus and 

 Subscapularis project beyond the bone, and arise from a strong 

 intermuscular septum common to both. 



Insertion : By a strong tendon into radial tuberosity of 

 humerus. The tendon passes beneath the acromion and over 

 the tendon of the Entopectoral, with which it is blended. 



Murie and Mivart (1, p. 29) describe the muscle in Lemur 

 catta as arising not only from the supraspinous fossa, but also 

 slightl}' from the posterior (inferior) side of the spine of the 

 scapula towards its acromial end. 



B. M. Infraspinatus 



(PI. XXXIII.) 



Is a narrow thick muscle, arising from the medial two thirds 

 of the infraspinous fossa and from the caudal surface of the 

 spine of the scapula, as far laterad as the acromion process. It 

 is inserted into the middle of the radial tuberosity of the 

 humerus. The tendon of insertion is closely united with those 

 of the Supraspinatus and Teres minor. 



C. M. Teres Minor. 

 (PI. XXXIII.) 



Origin : Lateral third of axillary border of Scapula in front 

 of the attachment of the long head of Triceps. Insertion into 

 lower part of radial tuberosity of humerus, and into the shaft of 

 the bone immediatel}^ below the tuberosity. It is a slender fusi- 

 form muscle. 



Murie and Mivart d, p. 30) state that the muscle is very small 

 and inconspicuous in L. catta, in which species it presents the 

 same arrangement as in L. hruneus. The same authors find the 

 muscle of moderate size in Galago crassicaudatus, attached quite 

 to the neck of the scapula, and slightly covered b}^ the Infra- 

 spinatus. 



In Galago allenii they found the Teres minor comparatively 

 larger than in L. catta, the fibres also arising more superficially 



Transactions N. Y. Acad. Sci., Vol. XVI., Sig. 23, February 8, 1898. 



