366 PROF. K. TON BARDELBBEX Olf THE [Apr. 17, 



lower end of the radius, but also an aponeurotic expansion reaching 

 to the first and second metacarpal bones. 



The extensor dir/itorum communis (" sublimis ") arises from the 

 humerus and goes to digits 2-5. 



The extensor digitorum '■'■profundus,'' as I should like to call it, 

 takes origin from the ulna and has the following insertions : — 



(1) Three tendons for digits 3-5 (ulnar border); (2) a tendon 

 dividing and going to the 3rd and 2nd digits ; (3) a strong muscular 

 belly with a very broad tendon divides into two, which end on the 

 first metacarpal and on the Pp. 



3. PARADOXrRtlS, Sp. 



a. Mexores. 



There are ttvo palmares longi (as in Linsancj), the stronger radial 

 one being supplied by the n. medianus, the other (ulnar) by the 

 ulnar nerve. 



Two m. ulnares intemi are present, both being supplied by the 

 ulnar nerve : — 



(1) The uln. int. rad. (humeralis) comes from the humerus and 

 is inserted into the top of the pisiform ; (2) the uln. int. idnaris 

 springs from the idna and ends in the MT-ist in a fascia (Hgam. 

 carpi transversum). 



These muscles are suppHed by the ulnar nerve. 



The '■'■flexor digiti brevis superficialis '' is present in this animal ; 

 it springs from an aponeurotic expansion on the wrist (which is 

 connected with the Pp.) and has three bellies, two of them being 

 inserted into the fifth digit, one into the fourth ending on phalanx 

 I. and on the sheaths of the tendons. 



The tendon of this flexor br. superflc. for the 4th digit is cleft 

 and perforated by the corresponding tendon of thej^^a-or sublimis. 



Both flexores longi, sublimis, and profundus take origin from the 

 humerus, the radius, and the ulna ; the subUmis is weak and goes 

 to phalanx II. of digits 1-4 (!), the profundus is strong and ends on 

 phalanx III. of digits 1-5. 



There are four lumbricales ; the third is the strongest, the fourth 

 arises from, the tendon of the sublimis (4th digit). 



On the radial border of the forearm runs a strong muscle from 

 the humerus (internal condyle) to the radius and the Pp., where it 

 ends in an aponeurotic expansion which is perforated by the art. 

 radialis. 



The superficial muscles on the Pp. are connected with the tendon 

 of the pronator radii teres. 



j8. Extensores. 



The extensor pollicis et p7-apollicis longus (ext. poll. I., Man) is 

 present ; it arises from the ulna and the radius. 



The supinator longus is weak. 



The radialis ext. long, and brev. are both present. 



The ulnaris ext. is extremely strong ; it takes origin from the 



