282 Journal of Comparative Neurology. 



me more satisfaction than that of replacing Gyms anncctcns, 

 bridging convolution, and pli de passage, by istliuiiis when the cor- 

 tical area is visible at the surface, and by vaduni when it is con- 

 cealed; the occasional interruption of the central fissure is thus 

 the Isthmus centralis ; that between the adjoining ends of the 

 parietal and paroccipital fissures, the Isthmus paroccipitalis, etc. 

 So far I cheerfully plead guilty to the charge. But with what 

 justice does Prof. His complain further that this employment 

 o{ isthmus \sm dL.n "unusual sense" when his own list contains 

 IstJimus gyri fomicatil Indeed, even were this complaint well- 

 founded, it comes with a poor grace from {a) a German whose 

 fellow-countryman (Waldeyer) applied (189 1 ) to the nerve-cell 

 the term neuron, which had been introduced by me ('84) for the 

 entire cerebro-spinal axis; from {li) a member of the Nomencla- 

 tur Commission whose chairman (KoUiker) applied (1893) to 

 the axis- cylinder process of a nerve-cell a term {iieuraxori) practi- 

 cally identical with one (neuraxis) which occurs in a standard 

 French Medical Dictionary for the cerebro-spinal axis; and from 

 {c) one who himself, upon altogether inadequate grounds,' has 

 made the term in question, isthmus, of segmental value, and who 

 has needlessly and unjustifiably modified the scope oi prosenccph- 

 alo7i and reversed the hitherto commonly accepted sense of 

 inetencephalon ; see Table VII. 



§198. Medipedunculiis. — Tothis term Prof. His devotes 

 one-fourth of his entire criticism (§170, p u). ', Hence some re- 

 joinder should be made although the objections impress me as 

 either ill-founded in themselves or inconsistent upon the part of 

 the objector. As a word, niedipeduncidus is no more "barbar- 

 ous" \\\AXi me ditidlium, 'I Mediterranean, or medieval. As a des- 

 ignation rather than a description, it requires definition. The 

 beginner would remember medipedunculus quite as easily as 

 "pedunculus cerebelli ad pontem ";^ and since experienced 

 anatomists know that there are three cerebellar "stalks" on 

 each side but only two " pedunculi cerebri," one on each side, 



^ This term, by the way, does not occur in the German list, where appar- 

 ently it is replaced by brachium pontis. 



