SPOLIA NEMORIS, 121 
the uterine wall. Two triangular flaps of muscularis and mucosa are folded 
backwards and reveal the foetus enclosed in its villiferous envelope. Cf. Figs, 
31, 32, 50, 51. 
Utr. Mus. Cat. n° Nycticebus 23. 
Fie, 24.—Galeopithecus variegatus. Pregnant uterus, opened opposite 
to the placenta. Embryo in amnion. The yolk-sac has been removed, to- 
gether with the portion of the uterine wall. Enlarged twice. 
Utr. Mus. Cat. n® Galeopithecus 18. 
Fie, 25.—Placentary area of the same, enlarged three times, after removal 
of the embryo. 
Utr. Mus. Cat. n° Galeopithecus 18. . 
Fic. 26.—Another uterus of Galeopithecus, in which the wall opposite 
the placenta has also been removed, but in which the foetal membranes, &c., are 
as yet all of them in situ. The blood-vessels on the yolk-sac are clearly 
visible. To the right of the figure the section of the uterine wall has passed 
through a portion of the placentary region. 
Utr. Mus. Cat. n° Galeopithecus 19. 
Fic. 27.—The same stage as that of Fig. 26, after the foetal envelopes have 
been opened and turned over (yolk-sac and amnion) to the right. The embryo 
is removed ; the placenta is visible. 
Utr. Mus. Cat. n* Galeopithecus 19. 
Fic, 28.—A similar stage, peeled out of the uterus. The placenta is partly 
visible on the left. The yolk-sac has been cut and turned over to the right, 
the embryo is yet enclosed by the amnion. 
Utr. Mus, Cat. n° Galeopithecus 1. 
Fie. 29.—Uterus of Galeopithecus at full term, opened. The ripe foetus 
is attached by the umbilical cord to the discoid placenta, which presents a 
smooth surface, continuous with that of the uterine wall in which it is im- 
planted. 
Utr. Mus. Cat, n® Galeopithecus 17. 
PLATE. 11. 
Figs, 30—33, 35, 36, and 41, natural size. Figs. 34 x 3,37 and 88 x 27, 
39 and 40 x 16. 
Fie. 30.—Nycticebus tardigradus. The same uterus as that of Fig. 
22. The flaps of the muscularis in the same position; mucosa opened; 
villiferous chorion inside this opened likewise; amnion partially removed. 
Utr. Mus. Cat. n° Nycticebus 24. 
Fic. 31.—Uterus of Nycticebus in somewhat earlier stage of pregnancy, 
opened by a circular incision. Muscularis and reticular mucosa have here been 
left in their natural connection, and the portion of the uterine wall that is 
