THE LIMBS OF THE HOKSE 



53 



common interosseous may be regarded as being continued between the 

 radius and ulna as the dor-sal interosseous artery, the course of which 

 has already been followed in the anterior radial region. 



A. RETis CARPI voLARis. — In the distal third of the forearm a small 

 vessel leaves the median artery and passes down to the volar aspect 

 of the carpus, where it assists the volar metacarpal arteries in the 

 formation of a network of small vessels, the rete carin volaris. 



J[. extensor carpi radialis. 



Kadius. 



V. cephalica autibracliii. 



M. Uexor carpi radialis. 

 V. mediana. 



A. mediana. 



V. mediana. 



N. medianus. 



M. ilexor digitonim ' 

 siiblimis. 



A. collateralis radialis. 



M. abductor pollicis. 



M. extensor digitorum 

 communis. 



1- Dorsal interosseous vessels. 



M. flexor digitorum pro- 

 fundus (caput radiale). 

 M. extensor digiti quinli. 



M. Hex;ir digitorum pro- 

 fundus (caput humerule). 



M. extensor carpi ulnaris. 



M. flexor digitorum pro- 

 fundus (caput ulnare). 



M flexor carpi ulnaris. V. collateralis _ A. collateralis ulnaris. 



ulnaris. >(. ulnaris. 



Fig. 35. — Section across the Forearm at the Level indicated by E in Fig. 30. 



Vv. MEDIANS. — As a rule there are two median veins, one following 

 each border of the median artery, radicles of which are contributed by 

 each of the three metacarpal veins. A common interosseous vein (v. 

 interossea communis) joins the posterior median, as does also a large 

 vessel that drains the deep flexor muscle of the digits. 



The metacarpal region and the digits as far as the margin of the hoof 

 must next be examined. The " foot " can be satisfactorily dissected only 

 in a specimen that has been specially prepared so as to allow of the 

 removal of the hoof without injury to the soft structures contained 

 therein, and this is not possible in the preserved limb upon which the 

 dissection, so far, has been performed. 



Before the removal of the skin, determine by sight and touch the 



