. Carnegie Institution of Washington publication. ANAL TUBERCLES. RAPHE POSTERIOR COMMISSURE B TEXT-FIGURE 2.—Drawings illustrating the parts of the external genitalia at the beginning of the definitive period. A. male embryo 45 mm. long (Specimen No. 948); B, female embryo 49 mm. (Specimen No. 2256). X 20. GENITAL-TUBERCLE PERIOD. Stage 1, 9 mm. (fig. 1, plate 1).—The earliest stage that I have studied is shown in an embryo 9 mm. long. In this specimen the genital tubercle is a very low conical eminence between the umbilical cord and the base of the tail. Its apex is. Please note that these i
. Carnegie Institution of Washington publication. ANAL TUBERCLES. RAPHE POSTERIOR COMMISSURE B TEXT-FIGURE 2.—Drawings illustrating the parts of the external genitalia at the beginning of the definitive period. A. male embryo 45 mm. long (Specimen No. 948); B, female embryo 49 mm. (Specimen No. 2256). X 20. GENITAL-TUBERCLE PERIOD. Stage 1, 9 mm. (fig. 1, plate 1).—The earliest stage that I have studied is shown in an embryo 9 mm. long. In this specimen the genital tubercle is a very low conical eminence between the umbilical cord and the base of the tail. Its apex is. 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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