of Sarcopliilus ursinus. 19 



There were two traclielo-acromiales muscles, as in the 

 otter, one from the transverse process of the atlas to the outer 

 half of the scapular spine ; the other arose from the same 

 process further back, and was inserted into the posterior 

 third of the scapular spine. In the former specimen I missed 

 the posterior portion of this muscle. 



The suprasj)inatus is double the size of the infraspinatus, 

 and equal to the subscapularis. There is a distinct small 

 teres minor ; I could not separate it in my former specimen. 

 The subclavius was not only attached to the clavicle, but also 

 extended beneath that bone to the spine of the scapula. 



The deltoid consisted of three parts : — a clavicular, from the 

 outer half of the clavicle (this I before thought was acromial) ; 

 an acromial, continuous with the trapezius ; and a scapular, 

 from the metacromion and anterior half of the scapular spine. 



The pectoralis quartus was a strap-like band from the linea 

 alba of the abdomen (extending upwards for "2 of an inch 

 from a point '25 above the umbilicus) ; its insertion is above 

 that of the pectoralis minor. 



The two tendons of the biceps were very closely tied toge- 

 ther, and the main body of the muscle was radial in its inser- 

 tion ; yet there was a very slender ulnar slip. The biceps was 

 twice the size of the brachialis ("32 oz. : "16 oz.). The extensor 

 mass was very much in excess of the flexors (1*67 oz. : 0*48 oz.). 

 The ancona3US externus was inseparable from the triceps, but 

 the anconseus internus was very distinct. The palmaris was 

 as described in my former paper. 



A careful dissection satisfied me that the slip Avhich I had 

 before taken as a supinator longus was really only a slip of 

 the panniculus carnosus — as it had no bony attachment, but 

 was directly continuous with the continued slip of the j)la- 

 tysma : the only supinator is the short one, which nearly equals 

 in weight the pronator quadratus. The extensor secundus 

 digitorum was only attached to the fourth and fifth digits ; 

 and the former digit had two tendons supplying it (in my 

 former specimen there were four tendons — two to the fifth, 

 one to the third, and one to the fourth). A separate slip 

 (ulnaris quinti) existed, which arose with the extensor carpi 

 ulnaris, and, passing in the groove in the annular ligament 

 with the extensor minimi digiti, is inserted into the base of 

 the fifth metacarpal bone. 



The psoas magnus and the iliacus are easily separated from 

 each other ; these, taken together, are four times the size of 

 the psoas parvus. The pectineus was not double, as it was 

 in the former specimen. The upper slip of the obturator ex- 

 ternus was semidetached from the rest of the muscle. 



2* 



