465 



9. I have likewise found the posterior sacral and coccygeal fibres of 

 the glutseus maximus severed from the rest of the muscle, so forming 

 the representative of the agitator caudae of quadrupeds. 



10. The anterior fibres of the gluteus medius were in a few instances 

 severed from the posterior, and formed a strong distinct scansorial 

 muscle. 



11. The quadratus femoris was three times split into two parallel 

 portions. I have never seen any further segmentation of this muscle, 

 although Jancke has described a triple division. 



1 2. The trapezius I have found once distinctly divided into two parts : 

 the upper or cranial portion, strong and distinct, arose from the usual 

 situation of the occipital bone, and passed outwards, forwards, and down- 

 wards, to the clavicle, forming a distinct occipito-clavicular muscle ; the 

 origin of the lower portion extended no higher than the ligamentum 

 nuchse, corresponding to the spine of the fifth cervical vertebra, audits 

 insertion fell short of the acromion process. A partial attempt at this 

 mode of division I have seen, and I have likewise found this upper or 

 occipito-clavicular muscle to be deficient ; perhaps it may be the repre- 

 sentative of a distinct element, although so frequently united to the rest 

 of the trapezius. 



13. The levator anguli scapulae I have seen split into three parts, the 

 slips from the transverse processes of the third, fourth, and fifth cervical 

 vertebras remaining separate as far as the insertion of this muscle. 



14. The flexor sublimis digitornm has frequently displayed differen- 

 tiation to a very considerable extent : in the right forearm of one subject, 

 and in the left of another, it was divided from its origin into two parts, 

 of which the outer was distinctly digastric. Its first belly arose from 

 the inner condyle, and about three inches below ended in a tendon, 

 which, after running for about two inches, formed the second belly, 

 which detached from its lower extremity two tendons for the outer pair 

 of fingers. The inner portion of the muscle also arose from the condyle, 

 but no radial origin was present for it or its fellow ; it terminated by 

 tendons for the inner or ulnar pair of fingers. In stenops, Meckel de- 

 scribes the whole of this superficial flexor as being digastric ; and it is 

 interesting to find an approach to that condition in the present instance. 

 In two other subjects the flexor sublimis was split into four slips up as 

 far as to within an inch of the inner condyle. JSTo radial head was pre- 

 sent in these instances. 



1 5. The subscapulars muscle in the arm of a thin female was split 

 into two portions by the circumflex nerve (Plate YIL, fig. 1, a) : the 

 superficial or inferior part arose by two tendons from the posterior and 

 inferior border of the scapula, and, passing below but on a plane super- 

 ficial to the remainder of the muscle, was inserted into the capsule of the 

 shoulder and the tip of the lesser tuberosity; this portion did not pierce 

 the capsular ligament. 



16. The adductor magnus femoris has been often completely divided 

 into an upper and lower part, the separation occurring sometimes in the 

 situation of the middle perforating branch of the profunda artery. I 



