"438 . PROFESSOR G. ELLIOT SMITH. 



above remarks. Thus Minot ^ says, " the mantle comprises all 

 that part of the hemispheres which enters into the formation 

 of neither the olfactory lobes {rhinencephalon) nor basal gan- 

 glia." This slight change of expression gives to the " pallium " 

 a significance very different from that of Eeichert, for it includes 

 the whole cerebral cortex, excepting only " the olfactory lobes." 

 What Minot may mean by the latter expression is not altogether 

 clear; but, judging from a footnote (p. 691), his "pallium" 

 includes the " lobus hippocampi " (-i.e., the caudal expanded part 

 of the pyriform lobe). 



In 1890 Sir William Turner ^ gave a more precise definition 

 of the term " pallium " ; for he divided the superficial parts 

 {i.e., all except the corpus striatum) of the hemisphere into 

 " pallium " and " rhinencephalon." Such a subdivision brought 

 into contradistinction these two terms which had previously 

 been employed for many years without any idea of the one 

 being complementary to the other. 



The term " rhinencephale " was originally applied by St 

 Hilaire to a type of imiocular monsters without any direct 

 reference to a region of the brain ; Eobin also used it in the 

 same sense. But Kichard Owen subsequently introduced the 

 term " rhinencephalon," apparently independently of St Hilaire 

 and Robin, to distinguish those parts of the brain which are 

 now known as the olfactory bulb and the olfactory peduncle. 

 By employing the same term as complementary to his " pallium," 

 Turner (1890) extended its meaning to include the regions 

 which in these notes are called tuberculum olfactorium, locus 

 perforatus anticus, and pyriform lobe. 



i: Now the term " lobus olfactorius" (or some equivalent ex- 

 pression, the word " rhinencephalon " being sometimes used) 

 had long been employed by writers upon cerebral anatomy with 

 a variety of different meanings. After Turner's memoir of 

 1890, the old term " rhinencephalon " attained a much greater 

 vogue than it had previously enjoyed, and many anatomists, 

 especially in Germany and America, adopted this expression and 

 used it in the same sense in which they had been using the term 

 " lobus olfactorius." It is unnecessary to cite instances of this, 



2 'I 



Human Emhryolofjy, 1890, p. 694. 

 Cohvoliitiona of the Brain," ./owr. of J Hat. and Phys., vol. xxv. 



