132 HUNTING TON. 



II. a. Taxidea Americana — American Badger. 



First specimen ; juvenile animal. 



Corrosion of bronchial system and pulmonary artery. Co- 

 lumbia University Museum, No. 1254. PI. XVI. 



The tracheal lacuna is large, bullous, rounded, projecting 

 caudad with a blunt rounded terminal cupola between the 

 caudal bronchial trunks. 



The primary trunks of right and left side, two in number 

 (PL XVI, A, A, B, B), arise directly from" the expanded tracheal 

 bud. They are, however, compared with those of Hystrix, no 

 longer quite symmetrical. 



1. Left Lung. 



a. Cephalic Trunk (A). 



Large, directed cephalo-laterad, distributing by monopodic 

 division, secondary branches cephalad and caudad. 



b. Caudal Trunk {E). 



A short wide stem, directed caudo-laterad. It divides, di- 

 chotomously, into two main secondary branches, a medial and 

 a lateral {B' , B"), each of which again divides in a nearly di- 

 chotomous manner, the main secondary and the resulting ter- 

 tiary branches giving off monopodic lateral twigs. (Mixed 

 dichotomous and monopodic type of division.) 



2. Right Lung. 



a. Cephalic Trunk {A). 

 A short wide stem, directed cephalo-laterad, divides into sec- 

 ondary branches as follows : 



a. A slightly smaller apical branch directed cephalo-laterad 



(A'). 



/9. A somewhat larger lateral branch, directed latero-caudad 

 (PI. XVI, A"). Each secondary branch gives off mono- 

 podic tertiary branches. 



k Caudal Trunk. (B). 



Very short, sessile, directed caudo-laterad. Divides almost 

 immediately into two secondary branches of nearly equal size {B' , 

 B"), the lateral branch {B') being slightly the larger. Each of 



