no 



of the term trophoblast to different placenta's, more particularly of man 

 and the monkeys, where the q^nestion arose in how far certain syn- 

 cytial tissues should be looked upon as maternal or as embryonic. Even 

 for pathological anatomy this proved to be a momentous question in so 

 far as the deciduoma malignum, if traced to remains of trophoblast-cells 

 would be very different from other deciduoma's that found their origin 

 in maternal tissue i). 



Now that the placentation of Tarsius, Tupaja, Sorex, Vespertilio. 

 Cercocebus, Talpa, Sciurus, Galeopithecus, Lepus and others has been more 

 carefully examined (trophoblastic proliferation having been figured by 

 Selenka as early as 1887 for one of the Didelphia [Opossum]) diver- 

 gence of opinion will in a few years hence have been replaced by 

 unanimity also on this head. 



And then the application of the name trophoblast to those placental 

 elements that arise from the embryonic layers originally designated by 

 that name will be in no way confusing, but will on the contrary con- 

 tribute to draw our attention to the intimate relation between the facts 

 as they take place under our eyes and their phylogenetic origin. 



With perfect justification Strahl has protested (ÜERTWiois Hand- 

 buch der Entwickelungslehre der Wirbeltiere, I, 2, p. 311) against a 

 misapplication of the terminology which I have reattempted once more 

 to explain in this article, when authors who have insufficiently studied 

 the subject, even go so far as to speak of a maternal trophoblast be- 

 side the embryonic! 



I hope that this paper may henceforth render misinterpretations 

 as were discussed in it, impossible. 



Bücheranzeigeii. 



Traite d'Histologie. Par A. Prenant, P. Bouin, L. Maillard. Tome I. 



Cytologie generale et speciale. 791 fig. (172 en plus, couleurs). 



Paris, Libr. C. Reinwald. Schleicher freres & Cie., 1904. XXXIII, 



977 pp. 80. 



Der erste, fast 1000 Seiten starke Band dieser großartig ange- 

 legten Histologie enthält die Lehre von der Zelle. Die Einteilung 

 des gewaltigen Stoffes ist folgende. I. Buch: Protoplasma und Zelle. 

 — IL Buch: Morphologie der Zelle. 1. Kap. Cytoplasma; 2. Kap. Zell- 

 membran; 3. Kap. Kern; 4. Kap. Centrosoma: 5. Kap. Besondere Or- 

 gane der Zelle. — III. Buch: Energetische und materielle Charaktere 

 der Zelle. 1. Kap. Die Zelle im Gleichgewicht; 2. Kap. Dynamische 



1) I am informed that at present the majority of gynaecologists 

 have followed Marchand, who, in a publication of 1895, gave expression 

 to the opinion that all deciduomas are chorio-epitheliomes. I may not 

 omit to mention here that in many cases of mammalian placentation 

 I have observed syncytia of undoubted maternal origin. 



