360 PROF. K. VOS BAEDELKBEN ON I'HE [-A-Pl'- 17, 



ficial muscle ends in a weak aponeurotic expansion (fascia 

 palmaris) and the Pp. ; the deep one goes to the Ug. carpi 

 transversum. 

 Hand: — (3) The '■'■plso-metacarpeus" comes from the pisiform 

 and the lig. c. trausv., and is inserted into the fifth meta- 

 bone. 



(4) A muscle from the lig. carp, transv. (tendon of the deep 

 palmar muscle) to the fifth metacarpal and first phalanx of 

 the minimus, divides into 



(a) ^the opponens 1 ....... 



(6) = the jiexor brevis J ^ 



(5) A muscle from the tendon of the superficial palmaris to the 

 second phalanx of the fifth digit ; the tendon is perforated 

 by the tendon of the Jl. profundus. 



I consider the muscle (4) and its homologue — also in Man — 

 as the vestiges of an old Jlexor brevis superjicialis (comp. Hyrax). 

 Supplied by the n. ulnaris and medianics : — 



(1) The Jlexor digitorum sublimis, connected with the 2>'>'<>fundus 

 at the origin and with the lumbricales of the 4th and 3rd digits 

 (vide below). 



The_^. siMimis arises — (i.) from the humerus, connected with 

 the humeral head of the ulnaris interuus and two heads of the 

 palmaris longus ; (ii.) from the radius, in common with the radial 

 head of the profundus ; (iii.) from the ulna, with the ulnar part of 

 the profundus. 



Insertion : digits 2-4 ; ends in tendon-sheaths and on' the 

 phalanges. 



(2) The flexor digitorum p>rofundus. 



Origin : (i.) humerus, with the radialis internus ; (ii.) radius, 

 with the subUmis ; (iii.) ulna, with the sublimis. 



Insertion : by five tendons to digits 1-5 and eight lumbricales- 

 Uke muscles to the tendon-sheaths of digits 2-5. 



(3) The 8 " lumbricales " are quite remarkable : — 



Origin. Insertion, 



(a) Tendon for the 5th dig., radial Eadial border of the 5th dig. 



side. 



(6) Tendon for the 4th dig., above. Tendon of the flex. subl. to the 4th 



dig., and sheath, 



(c) Tendon for the 4th dig., rad. side. Ead. border of the 4th dig. 



{d) Tendon for the 3rd dig., above Tendon of the flex. subl. for the 3rd 



(ulnar). dig., and sheath, 



(e) Common tendon and tendon for Kad. border of the 3rd dig. 



the 3rd dig., rad. side. 



(/) Tendon for the 3rd dig., rad. Ulnar border of the 2nd dig. 



side. 



(g) Tendon for the 2nd dig., above Tendon of the flex. subl. 2nd dig., 



(ulnar side). and sheath. 



{h) Common tendon, tend. 1st and Badial border of the 2nd dig. 



2nd dig. 



I think the muscles a, c, e, and h are real " lumbricales." What 

 the others mean I do not know. Perhaps we have here the 



