THE VASCULAR SUPPLY OF THE PLEURA PULMONALIS. 
BY 
WILLIAM SNOW MILLER. 
From the Anatomical Laboratory of the University of Wisconsin. 
Wire 12 TEext-FIGURES. 
In a paper presented before the Association of American Anatomists 
in 1905 (9e), I described the vascular supply of the bronchi and the 
relation which the bronchial circulation bore to the pulmonary. I pur- 
posely refrained from making any statements in regard to the distribution 
of the bronchial artery to the pleura for I wished to make a more 
extended study of the problem.’ 
That the histological structure of a given organ may differ in animals 
of different species, and even in different animals of the same species, is 
coming to be accepted more and more by investigators and it seems quite 
probable that eventually each animal will have to be studied independently. 
In no place is this fact so forcibly presented as in the excellent series 
edited by Oppel (10). 
Because a given structure, or relation of structures, is found in, for 
example, rabbits, it is no criterion that the same structure, or relation of 
structures, will be found in rats, and the inverse is true. We may, how- 
ever, find a type which, modified to a greater or less degree, runs through 
an extended series of animals of different species. 
In previous communications (9) I have stated that the pleura did not 
receive its vascular supply from the bronchial artery. I fear I failed 
to impress on the minds of my readers that this statement was made in 
regard to the dog; for some of my co-workers, notably Konigstein (7), 
have taken me to task for this statement. I myself made the mistake of 
thinking that the arrangement found in the dog’s pleura would hold true 
elsewhere and so found myself at variance with Kiittner (8) and Zucker- 
kandl (15) who described branches of the bronchial artery as being 
distributed to the pleura of the human lung. That they were correct in 
so stating, the present paper will show and, at the same time, I trust, will 
bring out some facts hitherto overlooked. 
1] wish to express here my thanks to Professor F. P. Mall and Dr. A. W. 
Meyer, of the Johns Hopkins Medical School for their generous assistance in 
procuring the necessary material for this study. 
AMERICAN JOURNAL OF ANATOMY.—VOL. VII. 
