248 Prof. J. C. Galton on the Myology 



arose from the first rib, in a space included between the inser- 

 tion of the scalenus and the rectus lateralis. The insertion 

 was at the inferior angle of the scapula and part of the axillary 

 costa of this bone. 



There was no trace of an omohyoid on either side. This 

 muscle seems to be absent in all the Edentata. Prof. Hyrtl 

 describes it as wanting in Chlamydo^horus''' . 



The levator claviculce was absent. 



The sterno-cleido-mastoid arose from the mastoidal and 

 adjacent portion of the occipital region of the skull, the sternal 

 factor being most anterior. The cleido-mastoid portion had a 

 broad fleshy insertion into the middle third of the clavicle, 

 the outermost fibres being in a line with the innermost fibres 

 of origin of the deltoid. The sterno-mastoid had a tendinous 

 insertion at the junction of the clavicle with the sternum (into 

 the " omo-sternal" element of Parker), but had no prolonga- 

 tion over the pectoralis major, being, in fact, completely co- 

 vered by the upper edge of the muscle. 



The subclavius is absent, as it is in M. jubata and taman- 

 dua. This muscle, according to Prof. Hyrtl, is " egregie evo- 

 lutus " in the Chlamydophore. 



The deltoid was very well developed, and appeared to be 

 made up of three factors : — 



1. Clavicular, the largest, arose from the scapular half of 

 the inferior edge of the clavicle and from the acromion, and 

 was inserted into the upper part of the deltoid tuberosity above 

 the origin of the brachialis anticus. 



2. Acromial, arose from the upper half of the spine of the 

 scapula, and was inserted into the humerus just posterior to 

 the origin of the supinator longus. 



3. Spinous, took origin from the middle third of the spine 

 of the scapula, and was inserted beneath the preceding divi- 

 sion of the muscle. 



According to Hyrtl, the deltoid has no clavicular portion in 

 Chlamydophorus. 



There was nothing worthy of note in the supraspinatus. 



The infraspinatus and teres minor were fused together. 



The subscapularis had the usual point of attachment. 



The teres major was enormously developed. The bulk of 

 the muscle arose from the lower half of the axillary costa of 

 the scapula, but was joined by a thin stratum of muscular 

 fibres which took origin from the whole of that portion of the 

 spine of the scapula which lies posterior to the origin of the 



* " Chlamydophori trtnicati cum Dasypode gymnuro comparatum exa- 

 men anatomicum " (Denkschrift. der k. Akad. der Wissenschaft. in Wien, 

 ix. Band, 1855). 



