28 Procccdbujs of the Royal Iridt Academy. 



good many muscular fibres attached to the upper part of the interos- 

 seous membrane. 



Extensor longus digitorum ("40) divided underneath annuhir liga- 

 ment into four very thin weak tendons. 



The extensor minimi cligiti(auricularis) ('10) was inserted into the 

 i)ase of the second phalanx of the fifth digit. Extensor minimi digiti 

 tei'tii ("05) arose fi'om upper fifth of radius and external lateral liga- 

 ment, ran alongside the auricularis, passing through a separate com- 

 partment of the annular ligament, and was inserted into the outer 

 sui'face of the base of first phalanx of fifth digit. 



Extensor carpi nlnaris ("28) arose from upper third of posterior 

 border of ulna. Extensor indicis et pollicis ('05), made up of the ex- 

 tensor secundi internodii pollicis, and indicator, presented a rather 

 remarkable arrangement. It arose fleshy by two heads — onefi'omthe 

 external surface of ulna, one inch below olecranon, the other fi'om the 

 xadius, aboA'e the superior radio-ulnar ligament ; it then passed down- 

 wards, and, on the dorsum of the manus, crossed beneath the tendons of 

 the extensor longus digitorum, and was inserted into the base of the 

 claw of poUux. The above arrangement was symmetrical. 



Adductor minimi digiti ("08). 



There were four palmar interossei, weighing respectively "06; -Oo; 

 •02; "01 ; the fourth corresponding to the interosseus of Henle in 

 man.. It arose from the deep palmar fascia, and was inserted into the 

 <lorsal aponeurosis of thumb. 



The four dorsal interossei weighed respectively '10; 'Oo; "10; "Oo. 



The fij-'st palmar and first dorsal interossei were inserted in a 

 peculiar manner, and the arrangement occurred on both sides. At- 

 tached to the posterior end of the base of each claw were two elastic 

 bands — one on each side — which extended to a tubercle on the head of 

 the phalanx. Into these bands the tendons of the first dorsal and 

 p)almar interossei were attached, about the middle, seemingly acting 

 as retractors of the claw. 



The palmar interossei being removed, a ligament was seen extend- 

 ing from the carpus to the fourth metacai'pal bone. It was attached 

 to the carpus by three slips : the middle one continuous with the 

 external retinaculum of the pisiform ; the internal one attached to the 

 head of the fifth metacarpal ; and the external, to the unciform and os 

 magnum. Its other end was inserted into the fourth metacarpal, about 

 its centre. Opposite the cai-po-metacarpal articulation, and for a short 

 distance down the fourth metacarpal, it was free, not attached to the 

 bone ; but I could discover no structure passing underneath it. 



It was similar in every respect to a corresponding one in the pes. 



The same arrangement occurred in the other manus. 

 The sartorius (5-21), broad and thin, covering the greater portion 

 of the inside of the thigh, arose from the iliac spine and part of Pou- 

 part's ligament. Insertion into the lower surface of head of tibia. 



Psoas parvus and magnus and the iliaeus (lO'OO) ; the two fonner 

 arose together normallv, after keeping together for about five inches 



