. Carnegie Institution of Washington publication. . FIG. 1.—INDIVIDUAL EGGS. X-4. A. Egg of Bufo lentiginosus americanus in two jelly-envelopes or tubes, the inner of which is divided by cross partitions. B. Egg of Rana palustris. Inner envelope and vitellus of same size as egg of Rana pipiens (G) but outer envelope smaller. C. Egg of Hyla pickeringii. The one envelope and the vitellus together appear the dupli- cate of the egg of Hyla versicolor (E) when it is stripped of its outer envelope. D. Egg of Rana clamata. Unlike the egg of Rana catesbeiana (F), it has an inner enve- lope and this is
. Carnegie Institution of Washington publication. . FIG. 1.—INDIVIDUAL EGGS. X-4. A. Egg of Bufo lentiginosus americanus in two jelly-envelopes or tubes, the inner of which is divided by cross partitions. B. Egg of Rana palustris. Inner envelope and vitellus of same size as egg of Rana pipiens (G) but outer envelope smaller. C. Egg of Hyla pickeringii. The one envelope and the vitellus together appear the dupli- cate of the egg of Hyla versicolor (E) when it is stripped of its outer envelope. D. Egg of Rana clamata. Unlike the egg of Rana catesbeiana (F), it has an inner enve- lope and this is elliptical, not round as in most Anuran eggs. E. Egg of Hyla versicolor. The outer envelope often ragged in outline. F. Egg of Rana catesbeiana. Unlike the other four Ranas, it has no inner envelope. G. Egg of Rana pipiens. Compare B. H. Egg of Rana sylvatica. It has the largest vitellus of the eight species figured and larger envelopes than the confusing B and 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 Carnegie Institution of Washington. Washington, Carnegie Institution of Washington
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