Bauhaus-Universität Weimar

Titel:
The Development of the Nine-banded Armadillo from the Primitive Streak Stage To Birth; With Especial Reference to the Question of Specific Polyembryony
Person:
Newman, H. H. Patterson
PURL:
https://digitalesammlungen.uni-weimar.de/viewer/image/lit38457/68/
PLATE III 
EXPLANATION OF FIGURES 
34. A view of the fundus end of a vesicle which contained embryos measuring 
31 mm. head rump length.4 In the portion of the vesicle lying within the margin 
of the placenta are seen four w'indow-like spots. These are the areas where the am¬ 
nia come in contact with the wall of the vesicle. The fundus end is now practically 
free of villi. X 5 
35. A view of the cervix end of a vesicle in which the embryos measured 31 
mm. The clear yolk-sac is seen through the opening in the rather thick placental 
overgrowth. The margin of this opening represents the place where the placenta 
is attached to the uterine mucosa at the cervix end of the uterus. X § 
30. The dorsal view of a vesicle which is still attached to the cervix of the con¬ 
tracted uterus. This vesicle shows a distinct placental bridge (p.b.) connecting 
the lateral placentae, and also a number of blood vessels at the fundusend. Em¬ 
bryos 32 mm. in length. X 3 
37. A view of the fundus end of a vesicle which contained embryos measuring 
33 mm. This view shows two points worthy of especial note: (1) the four-lobed 
appearance of the fundus membrane, due to constrictions occurring between the 
fundus areas of the individual embryos (seen more clearly before fixation); (2) 
the persistence of a few villi, which in the photograph appear as scattering black 
specks. X § 
38. A view of the ventral side of vesicle, with embryos measuring 3G mm. The 
cervix end of the yolk-sac is clearly visible, and blood vessels are seen at the fundus 
end. The placental bridge although present is not clearly brought out in the 
photograph. X I 
39. A view of the ventral side of a vesicle which contains embryos measuring 
53 mm. The division of the zone-like placenta into right and left halves is clearly 
brought out. The fundus end of the vesicle is now practically free of both villi 
an 1 blood vessels, and the membranous area at the cervix is much larger than in 
the preceding figure. X § 
’Unless otherwise stated, the length of the embryo will mean the head-rump 
measurement. 
PLATE III. 
DEVELOPMENT OF THE NINE-BANDED ARMADILLO. 
H. H. NEWMAN ANDJ. T. PATTERSON. 
34 
35 
36 
37 
38 
39 
JOURNAL OF MORPHOLOGY, VOL. 21, NO. 3.
        

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