414 



This strikes me as a dangerous doctrine, for who can tell how far 

 any element may "wander"? It is also inconsistent with any accuracy 

 of definition. In my last paper I expressed the opinion that it is 

 not impossible that the cuboides secundarium and the calcaneus 

 secundarius may be the same element; but this observation is fatal 

 to that view also. 



I may mention that after the appearance of my former paper on 

 this bone a distinguished American paleontologist wrote me to suggest 

 that in future I should call this bone Centrale 2. There is much 

 that is plausible in support of this, but my doubt of the accuracy of 

 our knowledge of the details of the arrangement of the elements of 

 the carpus and tarsus makes me hesitate to adopt it. As I said at 

 the end of my former paper, the key to the puzzle is wanting. 



Harvard Medical School, May 1911. 



Literature. 



1) Schwalbe, G., Ueber das Cuboides secundarium (Pfitzner). Zeitschr. 



f. Morph, u. Anthrop., Bd. 13, 1910, Heft 1, p. 1. 



2) DwiGHT, T., Description of a free Cuboides secundarium, with remarks 



on that element and on the Calcaneus secundarius. Anat. Anz., 

 Bd. 37, 1910, No. 7 u. 8. 



3) — , A criticism of Pfitzner's theory of the carpus and tarsus. Anat. 



Anz., Bd. 35, 1909, No. 15 u. 16. 



4) Bateson, W., Materials for the study of variation, treated with 



special regard to the discontinuity of species. 1894, 



5) Pfitzner, W., Die morphologischen Elemente des menschlichen Hand- 



skeletts. Zeitschr. f. Morph, u. Anthrop., Bd. 2, 1900. 



Nachdruck verboten. 



Eine neue Methode zum Studium frischer Fasersystem- 



degenerationen im menschlichen Gehirne mit Hilfe lüclcenloser 



Schnittserien, und über das Makrotomieren des Gehirnes am 



Unter wassermilcrotom . 



Von E. Venderoviö, Laboratoriumsvorstand. 



(Aus dem Laboratorium der Neurologischen Klinik des medizinischen 



Institutes für Frauen in St. Petersburg. Prof. W. v. Bechterew.) 



Mit 8 Abbildungen. 



Schon seit Jahrzehnten besteht das dringendste Bedürfnis, frische 

 Faserdegenerationen in den menschlichen Hemisphären an Osmium- 

 präparaten nach Marchi- Algier: zu untersuchen, was bis heute un- 

 durchführbar war. Diese Methode der italienischen Autoren, die so 

 reiche Ergebnisse bei der Untersuchung des Fasersystems im Stamme 



