362 • ABRAM T. KERR 



union of the dorsal divisions of the cephaHc and intermediate 

 trunks. 



In 6 plexuses one branch comes from the cord just mentioned 

 and the second from the dorsal division of the cephalic trunk. 

 In one of these one of the branches from the dorsal division of 

 the cephalic trunk arises with or from the suprascapular nerve. 



In 9 instances both nerves come from the posterior fasciculus 

 (fig. 20). In one of these there is another subscapular nerve 

 coming from the axillary but classified as a part of the axillary 

 subscapular nerve. 



In 4 cases one nerve comes from the cord formed by the union 

 of the dorsal divisions of the cephalic and intermediate trunks 

 and the other from the posterior fasciculus (fig. 19). 



There are 2 cases in which one branch comes from the fifth 

 cervical nerve and the other from the dorsal division of the 

 cephalic trunk. This second branch sends a small filament to 

 join a cord from which the axillary subscapular and the thora- 

 codorsal nerves arise. In one case one branch comes from the 

 ventral and one from the dorsal division of the cephalic trunk and 

 in one instance one comes from the cephalic trunk and one from 

 the posterior fasciculus. 



There are 9 plexuses in which there are three branches. In 5 

 of these two of the branches arise from the dorsal division of 

 the cephalic trunk. The third branch in one of these comes 

 from the dorsal division of the fifth cervical nerve ; in one it comes 

 from the dorsal division of the cephalic trunk like the other two 

 branches but has a second root from the dorsal division of the 

 intermediate trunk in common with the thoracodorsal nerve 

 (fig. 10) ; in one, the third branch comes from the trunk formed by 

 the union of the dorsal divisions of the cephalic and intermediate 

 trunks; in another from the posterior fasciculus; and in the last 

 of this group from the axillary nerve. In one plexus one branch 

 arises from the dorsal division of the intermediate trunk and 

 two come from the posterior fasciculus of the plexus. In one 

 case one branch comes from the cord formed by the union of the 

 cephalic and intermediate trunks, one from the dorsal divi- 

 sion of this, and a third from the posterior fasciculus. In one 



