50 C. W. M. Poynter 
(f) The order of branches is: Innominate, left carotid, left 
subclavian, left vertebral; see fig. 46. 
This condition is much less frequent than the preceding; cases 
have been reported by Meckel (1816), Tiedemann (1822), Szaw- 
lowsky (1906) and Adachi (1914) 2 cases. 
(g) The order of branches is: Innominate, made up of the 
right common carotid and the right vertebral, the left common 
carotid, the left subclavian and the right subclavian. These cases 
have been previously reported under II, D, 2, and need not be re- 
peated here. 
(h) The order of branches is: Innominate made up of the right 
common carotid, the right vertebral and the left common carotid, 
the left vertebral, the left subclavian and the right subclavian. 
Cases have been reported by Brodie (1889) and Abbott (1892). 
(1) The order of branches is: Right subclavian, a common 
stem for the carotids, left vertebral, left subclavian. A case has 
been reported by Hall (1870). 
(k) The order of branches is: Innominate, made up of the 
right common carotid and the right internal mammary, left com- 
mon carotid, left subclavian, right subclavian. This condition 
was observed by Ludwig (1764). 
(1) The order of branches is: Innominate, left carotid, left 
subclavian, right vertebral. For cases illustrating this condition 
See section I, Dy 2: 
(m) The order of branches is: Innominate, left internal caro- 
tid, left external carotid, left subclavian. The group of cases 
listed under II, D, 7 are examples of this condition. 
(7) In right aortic arch the order of branches is: Left carotid, 
right carotid, right subclavian, left subclavian. This arrangement 
has already been discussed in section II, C, 2, and a list of re- 
ported cases given. 
(o) The order of branches is: Right carotid, left carotid, left 
subclavian, right subclavian. This arrangement is the counter- 
part of the preceding and represents the simplest condition in the 
cases of low origin of the right subclavian. 
Since the classification under II, D, 1 is from a different stand- 
point, the lists of cases, while including this condition, do not in- 
278 
