VARIATIONS IN THE DISTRIBUTION OF THE BILE 
DUCT OF THE CAT (Felis domesticus). 
W. S. MILLER, M. D. 
Associate Professor of Anatomy, University of Wisconsin. 
MATERIAL. 
The results of the following investigation are based on a study 
of one hundred animals which were obtained for use in the Com¬ 
parative Anatomy Laboratory of the University of Wisconsin. 
It is highly improbable that there was any close relationship be¬ 
tween the different individuals for they came from all parts of 
the city of Madison and the surrounding country. All the ani¬ 
mals were full grown. Ao record was kept in regard to sex or 
sex variations. 
NOMENCLATURE. 
Lobes: —The liver of the cat is divided by the Ligamentum 
falciforme hepatis into a right and left half; each half is further 
subdivided into secondary portions termed lobes. The number 
and names of the various lobes differ according to the author one 
may be reading. 
In aecordance with the results of this study the liver of the 
cat is subdivided into six lobes, viz., quadrate, right median, 
right lateral, left median, left lateral and caudate (Fig. 1). I 
have named the median division of the right lateral “quadrate” 
because, as will be seen, its ducts have a separate distribution 
from that of the lateral division and because it is homologous 
with the quadrate lobe of the human liver. I have also consid¬ 
ered the cranial and caudal divisions of the right lateral lobe as 
divisions, rather than separate lobes, because their ducts usually 
unite and because there is always present more or less fusion of 
the two divisions. 
