PLATE IV
EXPLANATION OF FIGURES
40. The dorsal view of a vesicle in a rather advanced stage of development.
The embryos measure 155 mm. from tip to tip. The dorsal notch, d.n., although
extending down to near the meddle of the vesicle, does not completely separate
the lateral placental discs. X §
41. Dorsal view of a vesicle showing the difinitive condition of the placenta.
The placenta is divided into two lateral discs, each of which is distinctly bilobed.
The notch between the two lobes of the left lateral (on right) disc is clearly shown
in the photograph (n.l.l.). The discs are united to each other both on the dorsal
and ventral side by placental bridges, the one on the dorsal side (d.b.) being the
narrower. The original arborescent villi at the cervix end have greatly degen¬
erated, and have become reduced to flat, blunt knobs. The embryos in this vesicle
are about 210 mm. from tip to tip. X i.
42. Right lateral view of a uterus showing a dorso-ventral bilobing. Embryos
are 48 mm. long. X | .
43. Ventral view of a pear-shaped uterus, which contained embryos measuring
52 mm. This and the preceding uterus show two of tlie several forms that have
been observed. X è
DEVELOPMENT OF THE NINE-BANDED ARMADILLO.
H. H. NEWMAN AND J. T. PATTERSON.
PLATE IV.
JOURNAL OF MORPHOLOGY, VOL. 21, NO. 3.