526 Mr. J. Wood on Variations in Human Myology. [May 23, 



outer joining the coronoid insertion of tlie hrachialis anticios at its inner 

 border (y) ; the middle once is implanted upon the deep or coronoid 

 origin of the pronator radii teres (f), and the inner, connected under 

 the superficial muscles with the coronoid origin of the flexor digito- 

 Tum sublimis. We have thus in this complicated arrangement four in- 

 sertions in addition to the usual two. These are, moreover, connected 

 with four other muscles, viz. the hrachialis anticus, the pronator radii 

 teres, the flexor sublimis digitorum, and the supinator brevis. 



In another subject also (No. 13), the biceps sent a slip to join the 

 coronoid origin of the pronator radii teres. It was detached from the 

 middle of the inner border of the muscle, as a band of muscular fibres 

 provided with a separate tendon. In the right arm this joined with the 

 semilunar fascia, and on the left with t\ie pronator. 



8. Goraco-hracTiialis. — In four instances this muscle presented a com- 

 plete interval between its lower fibres implanted into the internal inter- 

 muscular septum -and brachial ligament, and its upper fibres, inserted 

 into the humerus. In one (No. 27) its highest fibres were inserted into 

 a fibrous band, constituting an upward prolongation of tlie internal 

 brachial ligament across the tendon of the latissimus dorsi and teres 

 major, as described by Henle. In all, the musculo-cutaneous nerve 

 passed between the two portions. In No. 30 the muscle was inserted 

 into the intermuscular septum at quite the lower third of the arm. 



9. JBracliialis anticus. — In two subjects a slip of the outer fibres of 

 this muscle was continued into those of the supinator longus. In one 

 right arm (No. 26) it sent ofi" over the brachial vessels and median nerve 

 a slip of fascia to join the semilunar. In one (No. 31) it was deeply di- 

 vided down the middle, the outer part sending some fibres into the 

 supinator longus, and others into the bicipital semilunar fascia. The 

 first-mentioned peculiarity has been before described by the author, and 

 the last has been noticed by Hildebrandt, Scemmerring, Theile, and 

 Meckel, and was compared by the last-named anatomist to the arrange- 

 ment in Birds. 



10. Flexor sublimis digitorum v. perforatus. — Out of nine instances 

 df irregularities in this muscle two were specimens of deficiency. In 

 one (No. 5) the radial origin was entirely absent, in another (No. 18) 

 the tendon to the little finger was wanting. This has been noticed by 

 Meckel, Theile, and Henle. In No. 9, a muscular slip from the middle 

 of the pronator radii teres joined the radial fibres of the sublimis. This 

 has been noticed by Otto. In four subjects (Nos. 6, 8, 21, & 31) the 

 origin of the flexor sublimis was variously differentiated. In the right 

 arm of No. 6, a separate muscle arising from the inner border of the 

 coronoid process gave the perforatus tendon of the index. 



A separate coronoid or middle head is described in many text-books 

 as a normal arrangement for the flexor suhlimis digitorum. 



In almost every subject, however, the author has found that the fibres 



