THE MUSCLES OF THE UPPER EXTREMITY. 147 



In the Raven they are found to be as follows : — 



85. The extensor proprius pollicis. 89. The abductor minimi digiti. 



86. The flexor brevis pollicis. 90. The flexor metacarpi brevis. 



87. The flexor minimi digiti. 91. The interosseous dorsalis. 



88. The flexor minimi digiti 92. The interosseous palmaris. 



brevis. 



85. TJie extensor proprius pollicis ^ is a neatly 

 arranged little muscle admirably adapted to the exten- 

 sion of the pollex digit. Spindle-shaped in form, it 

 arises from the ulnar side of the tendon of the extensor 

 metacai'pi radialis longior, and is inserted into the 

 antero-ulnar side of the pollex phalanx, being tendinous 

 both at its origin and its insertion. 



A muscle of this name is described by human ana- 



^ Selenka and De Man considered this to be an abductor of the 

 thumb^ and Gadow has given us the following synonymy for the 

 muscle : — 



" 98. M. ABDUCTOR POLLICIS. 



Innerer Daumenstrecker (Extensor jjollicis internvs). Wiedemann, 



p. 93 ; Schopss, No. 42. 

 Langer Daumenstrecker. Tiedemann, § 274. 



Prechtl, § 63. 

 Langer oder innerer Daumenstrecker. Heusinger, p. 190, No. 28 



(Extensor pollicis). 

 Ohne Namen. Meckel, p. 349, No. 3. 

 Abductor 'pollicis brevis. Selenka, p. 138, No. 73. 

 Abductor ])ollicis. De Man, No. 37. 

 L'abducteiir direct de l' appendix. Court abducteur palmaire. Alix, 



p. 418. 



" Entspringt fleischig von der Yentralflache der Sehne des 

 M. extensor metacarpi radialis etwas proximal von dessen Insertion 

 an dem hervorstehenden Knorren des Metacarpale I. Der ziemlich 

 rundliche Muskel windet sich an der Yolarflache jenes Knorrens 

 vorbei und inserirt sich mit kurzer Sehne an dem radialen oder 

 vorderen innerer Yorsprunge des Pollex oder etwas distal da von " 

 (Bronn's Klassen, vi. Band, p. 289). 



L 2 



