Joseph Marshall Flint Tag 
and Nicholas and Dimitrova have accepted Robinson’s terminology, 
while Willach, Narath, Merkel, and Bremer have followed Aeby. 
Although he believes the selection an unhappy one, Narath, like His, 
uses the term “ventral” simply because it has received general accept- 
ance in the literature and because the bronchi run to the ventral part of 
the lung. All of the lateral group receive a topographical nomenclature 
from Ewart, while d’Hardiviller calls them “external bronchi,’ and 
Blisnianskaja “the ventrolateral” group. Curiously enough, these are 
the only branches of the entire bronchial tree which all authors unani- 
mously agree, despite the different terminology, are wholly independent 
derivatives of the stem bronchus. 
Owing to the topography of the origin of this series of bronchi from 
the lateral wall of the stem, the author has followed Robinson, Zum- 
stein, and Nicolas and Dimitrova in their nomenclature instead of Aeby 
and His. This is quite logical for, as His has pointed out, all of the 
ventral characteristics of this group are secondary to their later growth 
ventralwards in the space between the diaphragm and chest wall. The 
spiral line formed by joining the origins of the lateral bronchi on the 
stem represents the extent of ventral growth of these bronchi, as the 
upper elements reach farther ventralwards than the lower and conse- 
quently the torsion of the stem is greatest above and gradually dimin- 
ishes as the lower elements are reached. These occupy practically the 
lateral plane of their origin. Finally, the presence of a real set of ven- 
tral bronchi in many species renders the change in the nomenclature 
urgent. . 
DORSAL BRONCHI. 
With the exception of Ewart, d’Hardiviller, and Blisnianskaja, all 
authors designate this group the dorsal bronchi. d’Hardiviller calls 
them posterior bronchi, while the latter classifies them as a dorsolateral 
group. ‘There is also a general agreement that they are independent 
derivations of the stem bronchus, although Narath, without absolutely 
pledging himself to this view, is inclined to look upon them as a group 
primarily derived from the lateral series. He reaches this conviction 
partly because he regards the “ Eparterial ” bronchus as the first dorsal 
bronchus and a definite dorsal branch of Lateral 1 and partly because 
they bear a certain similarity to branches of the lateral group. In conse- 
quence of the shifting of his Dorsal 1 up on to the trachea or stem 
bronchus, Narath regards Aeby’s D. 1, D. 2, D. 3, etc., as D. 2, D. 3, 
and D, 4, respectively. In looking upon the dorsal group as derivatives 
