. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WISLOCKI & fawcett: placenta of pronghorned antelope 547 Approximate counts of the cotyledons in the 4 uteri yield the follow- ing figures: Numbers of cotyledons in each placenta (right and left) Spec. 1 Spec. 2 Spec. 3 Spec. 4 r I r I r I r I Large cotyledons 20 22 32 33 25 27 38 37 Small cotyledons 17 18 16 17 21 20 24 23 Totals 37 40 48 50 46 47 62 60 There appears to be some increase in numbers with age, but whether or not this is a significant and constant feature we do not Fig. 1. Diagrammatic drawing
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. WISLOCKI & fawcett: placenta of pronghorned antelope 547 Approximate counts of the cotyledons in the 4 uteri yield the follow- ing figures: Numbers of cotyledons in each placenta (right and left) Spec. 1 Spec. 2 Spec. 3 Spec. 4 r I r I r I r I Large cotyledons 20 22 32 33 25 27 38 37 Small cotyledons 17 18 16 17 21 20 24 23 Totals 37 40 48 50 46 47 62 60 There appears to be some increase in numbers with age, but whether or not this is a significant and constant feature we do not Fig. 1. Diagrammatic drawing of the interior of a pregnant uterus of Anti- locapra americana, illustrating the shape and relationships of the gestation sacs. The fetuses (18 cm. crown rump lengths) have been removed to show to better advantage the arrangement of the chorion, amnion, allantois and cotyle- dons. Observe the fused amnions in the corpus uteri. For further information consult text. All., Allantois; All. C, Allantoic Cavity; Am., Amnion; Am. C, Amniotic Cavity; Bl., Urinary Bladder; Ch., Chorion, x %â In the upper corners of the diagram cross-sections of the ovaries are pre- sented revealing the presence of 4 corpora Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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