280 



THE CAT. 



[CHAP. ix. 



lower margin of the subscapular muscle (with the posterior cir- 

 cumflex artery) between the scapula and teres major, and goes to 

 the deltoid, teres minor, and skin of the shoulder. 



The MUSCULO-SPIRAL nerve is that supplying the supinator and 



'i-. 132. NERVES OF RIGHT FORE-PAW 

 PALMAR ASPECT. 



Median nerve supplying pollex, index, 

 meclius, and part of annulus, digits. 



Ulnar nerve supplying the minimus and the 

 other part of the annulus, digits. 



Fig. IDS. DIAGRAM OF THE LEFT LUMBAR 

 AND SACRAL PLEXUSES. 



4Z, 5L, 6L and TL. Fourth, fifth, sixth, ami 



seventh lumbar nerves. 

 IS and 2S. The sacral nerves. 

 (ic. Anterior crural nerves. 

 cd. Caudal nerves. 

 ec. External cutaneous nerve. 

 (jc. Genito-crural nerve. 

 (jl. Gluteal nerve. 

 (is. Great sciatic nerve. 

 He. Ilio-hypogastric nerve. 

 Hi. Ilio-iriguinal nerve. 

 2~>. Pudic nerve. 

 pz. Nerve to psoas muscle. 

 ss. Small sciatic nerve. 



extensor muscles, as well as the skin of the hack of the lower part of 

 the upper arm, and that of the hack of the fore-arm and paw. It takes 

 origin above the vessels of the axilla, and passes round the hack of 

 the humerus to the radial side of the front of the fore- arm, when it 

 descends between the supinator longus and the insertion of the 

 hrachialis anticus, and then divides into the radial and posterior 

 inter-osseous nerves. 



The former of these (radial) passes down the fore- arm outside the 

 radial artery, and hidden by the supinator longus, till near the wrist, 

 where it becomes subcutaneous, and is distributed to the dorsum of 

 the pollex, index, and median digits. One branch goes to the pollex 



