516 Proceedings of Royal Society of Edinburgh. [ sess . 
which the only improvement upon that of Flower appears to he 
the substitution of the term lobus omentalis for “ Spigelian lobe.” 
It must he admitted that the former name affords some idea of 
the relationship of this portion of the liver, which “Spigelian” 
does not. The latest investigation upon the subject is that of 
Ruge (13), and here again no radical alteration of Flower’s views 
is attempted, except the desire to consider the Spigelian and 
caudate lobes as merely parts of one lobe ( lobus vence cavce) and 
not as independent entities. Undoubtedly there is much reason 
for such a combination ; for the caudate and Spigelian lobes are 
certainly connected with each other by liver substance crossing the 
ventral face of the vena cava. It seems desirable, therefore, to 
call them lobules , the component part of a caval lobe. 
The views of Cantlie (19), regarding the division of the liver, 
not having received acceptance at the hands of anatomists, there 
appears to be no reason for declining the universal adoption of 
the divisions of Flower, with such slight modifications as the 
observations of Rex and Ruge have suggested. In the descriptions 
of the liver of Cercocebus and Lagothrix the nomenclature as in- 
dicated in the following table will be employed. The fissure by 
which the caval lobe is separated from the right lateral lobe might 
be known as the right dorso-lateral fissure if a special name is 
required : — 
Caval Lobe ( lobus vence cavce , Ruge) : 
Omental Lobule ( lobulus omentalis , Rex, modified : Spigelian 
lobe). 
Caudate Lobule ( lobulus caudatus ; caudate lobe). 
Right Dorso-Lateral Fissure {incisura interlobaris dorso-lateralis 
dexter). 
Right Lateral Lobe ( lobus lateralis dexter , Ruge). 
Right Lateral Fissure ( incisura interlobaris lateralis dexter , 
Ruge). 
Right Central Lobe ( lobus centralis dexter , Ruge). 
Umbilical Fissure ( fossa sagittalis sinistra , Ruge). 
Left Central Lobe ( lobus centralis sinister , Ruge). 
Left Lateral Fissure ( incisura interlobaris lateralis sinistra , 
Ruge). 
Left Lateral Lobe ( lobus lateralis sinister , Ruge). 
