NATUEAL SUBDIVISION OF THE CEREBRAL HEMISPHERE. 439 



because the example (that of His) which has gained the widest 

 currency is discussed below. Others again (and especially those 

 who employ the Frencli language) began to employ the term 

 -" rhinencephalon " as a synonym for the " lobus limbicus " of 

 Broca. 



As the result of all this diversity of application of the term 

 which is now found in anatomical literature, the greatest con- 

 fusion reigns ; and as the name in question is most generally 

 -employed as the complement of the " pallium," the latter also 

 loses an exact significance. 



If the curious reader will take the trouble to examine the 

 most recent literature of this subject, he will find each of 

 these terms being employed at the present time in half a 

 dozen different senses, and it is by no means rare to find two 

 and sometimes three meanings attached to each of these ex- 

 pressions in one work. It would serve no useful purpose to 

 enumerate and discuss all these vagaries of interpretation of the 

 terminology in question. But there are three important appli- 

 cations of the terms, which it is necessary (simply because 

 they are so widely prevalent) to consider and seek wherein they 

 fail as natural subdivisions of the hemisphere. 



The first is naturally that of Sir William Turner, who first 

 placed the two expressions in juxtaposition ; secondly, there 

 is the interpretation of His, who, as the reporter of tlie German 

 Nomenclature Commission, as well as by his own reputation as 

 a sound anatomist, exerts a singularly wide-spread influence; 

 and in the third place, there is Broca's theory of a " limbic 

 lobe," which still exercises a strange fascination over the minds 

 of many writers. 



The consideration of these views lends itself best to intelli- 

 gent discussion if we examine the views of His first. The facts 

 observed during the development of the human brain form the 

 basis of the teaching of His ; the data of comparative anatomy 

 do not enter into his consideration of the limits of the " rhinen- 

 cephalon " whatsoever ; and hence it is not surprising that the 

 fatal defects of his subdivision are most clearly demonstrated by 

 the comparative method. His himself ^ does not apply his 



^ " Die Formentwick. il. niensch. Vorderhirns," etc., Abhandl. d. konigl. Sachs 

 Gesell. d. Wissensch. , Bd. xxvi.. Math. Phys. Classe xv.,,.1889, )». 714. 



