249 
In region 1 there are large and numerous folds. Region 2 is 
shown in Figs. 4 and 5. In regions 3 and 4 no difference could be 
noted from that observed in region 2. In region 5 the folds are 
smaller in size and less in number. Toward the end of region 5 the 
folds resemble those found in regions 1 and 2 of embryo VI. In the 
lower part of region 6 there is simply a thickening of the epithelium, 
there being no folds nor villi. 
In embryo XXXIV the study of the various regions shows that 
there are villi present throughout the small intestine with the exception 
of the lower part of region 6; here there are present in place of villi 
large folds like those observed in region 1 of embryo XLV. 
The remaining embryos show villi throughout the small intestine. 
A brief summary of the development of the villi of the intestine 
is as follows: 
1) The number of villi in the intestine increases with the age of 
the embryo. 
2) Fully developed villi and young villi exist in the growing in- 
testine side by side. 
3) The villi appear first as longitudinal folds. These folds grow 
larger and then break up into villi. 
4) The villi develop first in the upper portions of the intestine. 
Nachdruck verboten. 
Erythrocyten und Blutplättchen. 
Vorläufige Mitteilung 
von Dr. ©. Sacervortı, Privatdocent der allgem. Pathologie. 
(Aus dem Institute für allgem. Pathologie der Universität Turin.) 
Seit dem Jahre 1892, d. h. nach der Veröffentlichung der letzten 
Arbeit Bizzozero’s'), ist die medicinische Litteratur über die Blut- 
plättchen mit Arbeiten bereichert worden, die fast alle [mit alleiniger 
Ausnahme, wie ich glaube, der LAvpowsky’schen ?) und der meinigen *)| 
gegen die Anschauung sprechen, daß die Blutplättchen einen präexi- 
1) G. Brzzozmro, Festschrift f. R. Vırcmow, Berlin 1891, Bd 1. 
2) M. Lavpowsky, Zeitschr. f. wissensch. Mikroskopie, Bd. 10, 
1893, p. 4. 
3) C. Saczrvorrı, Archivio per le scienze mediche, Vol. 17, 1893, 
p- 35. 
