cvi Journal of Comparative Neurology. 



made at the apex of the calamus caused both to be permamently des- 

 troyed. This observation offers support to the older view as to the 

 respiratory centre. 



The Cephalic Extremity of the Brain Tube.' 



Professor His discusses at length the relation between the views 

 presented by Kupffer in his " Studien zur vergleichenden Entwick- 

 lungsgeschicte des Kopfes der Kranioten^ and his own summarized 

 in the Archiv in 1892.^ 



His objects to the term lobus olfactorius impar proposed by Kupffer 

 for the point where the lamina terminalis closes last, claiming, as we 

 have done, that it has nothing to do with the olfactory, and substitut- 

 ing the term angulus terminalis. The difference between the two po- 

 sitions is, in a word, that Professor His considers the whole terma 

 from olfactory recess to angulus terminalis the neuropore (Hirnnabel) 

 while Professor Kupffer mcludes only the angulus. Professor Kupffer 

 has called in question the existence of a frontal suture line upon 

 which the theory of His is founded while the latter claims to have 

 demonstrated its existence in Selachians and the rabbit. The figures 

 given by Professor His seem to us to favor our own view in accord- 

 ance with which the recessus infundibuli should be considered the 

 primitive cephalic extremity of the tube. The point where the brain 

 tube closes last will sustained no necessary relation to the morphologi- 

 cal front but will be determin by the rate of growth and index of 

 curvature. 



Subdivision and Nomenclature of the Brain. 



In the same periodical and in connection with the above topic 

 Professor His offers suggestions as to the subdivisions of the brain 

 tube.* We are permitted to become slightly accustomed to the use of 

 one set of terms when we have our equinimity destroyed by seeing 

 the familiar names replaced by others more formidable in polysylabic 

 and barbaric splendor than the preceeding, or, what is still worse, we 

 see the familiar terms doing duty for an entirely different segment of 

 the brain with no more reason than to form a pleasantly alliterative 



^His, WiLHELM. Ueber das frontale Ende des Gehirnrohres. Archiv f. 

 Anat. u. Physiologie •^. 157, 1893. 



'See March number of this Journal p. xxiii. 



^See review in June number of this Journal p. ivi, 



*Vorschlage zur Eintheilung des Gehirns. I.e. p. 172. 



