Literary Notices. Iv 



there has been no vertebra intercalated between the two plexuses, and 

 the author concludes from evidence which we cannot here review that 

 neither' intercalation nor excalation of vertebrae nor slipping of the 

 sacrum^^has taken place, but that the abnormal position of the girdle 

 represents the development of a new girdle at a new point, or rather, 

 as he states e'sewhere and which is not exactly the same thing, the 

 girdle may be called forth at primarily different distinces (measured in 

 segments) from the cranium under the stimulus of limb formation. In 

 general, nervous and skeletal parts are not directly correlated, but only 

 through their common relation to the muscular system, as suggested 

 by Fiirbringer and Eisler. 



The author's generalizations are carefully made and are of con- 

 siderable importance to the study of meristic variation, though the 

 data are too meager to permit a very far reaching application at pres- 

 ent. We may note in passing that the word plexus is of the fourth 

 declention and we can find no good authority, either Latin or English, 

 for the plural form plexi, as used in this paper. 



c. J. H. 



Tlie Neuroglia/ 



Edinger has characterized Weigert's great monograph as revolu- 

 tionary and one of the most important books^of its year. This is 

 doubtless true, and that too independently of nhe ultimate truth or 

 error of that author's* conclusions, which must be regarded as in part 

 at least still sub judice ; for it marks an era of special activity evoked, 

 as usual, by advances'} in technique. Some of the evidences of this 

 activity appear in the papers cited below, which were partly called out 



^ Weigert, Carl. Beitrage zur Kenntniss der normalen menschlichen 

 Neuroglia. ^/i(5/4. d. Senckenberg' schen Naturf. Ges. in Frankfurt a- M., XIX, I, 



1895 



Mallory, Frank B. Centralbl. f. allg. Pathol, u. path. Anatomie, VI, p. 

 753. 1895. 



EURICH, F. W. Studies on the Neuroglia. Brain, XX, 77-78, 1897, p. 114. 



The Human Neuroglia — Glioma and Neuroglioma. Editorial in The Jour. 

 Am. Med. Assoc, XXIX, 23, 4 Dec, 1897. 



Taylor, Edward Wyllys. A Contribution to the Study of Human Neu- 

 roglia. Jour. Experim. Med., II, 6, Nov., 1897. 



Thomas, H. M. and Hamilton, Alice. The Clinical Course and Patho- 

 logical Histology of a case of Neuroglioma of the Brain. Ibid. 



Robertson, W. F. The Normal Histology and Pathology of the Neuro- 

 glia (in Relation Specially to Mental Diseases). Jour, of Mental Science ^ XLIII, 

 147, Oct., 1897. 



