ment of the Kidney, and the Development of the - Journal of Cell ...

DEVELOPMENT OF AMPHIBIAN KIDNEY 473
Fig. 11.—Newly metamorphosed frog. X 100.
Figs. 12 and 13.—Four-legged (32 mm.) tadpole. X 175.
Fig. 14.—Newly metamorphosed frog. X 100.
Fig. 15.—Third-year (53 mm.) frog. X 175.
Fig. 16.—Third-year (53 mm.) frog. X 3.
Fig. 17.—Central portion of fig. 5. X 200.
Figs. 18 and 19.—Four-legged (32 mm.) tadpole. X 175.
Fig. 20.—22-mm. tadpole. X 175.
Figs. 21 and 22.—Newly metamorphosed frog. X 100.
PLATE 23.
Miorophotographs to show the structure and relationships of the vasa
efferentia (fig. 30), anterior prolongation (figs. 27,28, 29, 31, 32), and seminal
vesicles (figs. 23-6).
Fig. 23.—Seminal vesicle of third-year (53 mm.) frog. X 45.
Fig. 24.—Seminal vesicle of late second-year (42 mm.) frog. X 80.
Fig. 25.—Seminal vesicle of early second-year (35 mm.) frog. X 200.
Fig. 26.—Seminal vesicle of four-legged (32 mm.) tadpole, x 300.
Figs. 27-9.—Early second-year (35 mm.) frog. X 150.
Fig. 30.—Late second-year (42 mm.) frog, x 60.
Fig. 31.—Early second-year (35 mm.) frog. X 150.
Fig. 32.—Late second-year (42 mm.) frog. X 100.
The measurements given for frogs are taken with a flexihle measure from
the tip of the snout to the anterior margin of the cloaca. Those for tadpoles
are projected measurements from the tip of the snout to the end of the tail.
Notes on orientation.
PLATE 20.
Figs.l, 2, 3: lateral to right; ventral to bottom; figs. 4 and 5: lateral to
right, dorsal to bottom; fig. 6: lateral to bottom, dorsal to left; fig. 7:
lateral to bottom, dorsal to right.
PLATE 22.
Figs. 11-14 and 18-22: The testis or anterior prolongation lies medioventral
to the kidney or archinephric duct. Figs. 10 and 15: peritoneal
surface of kidney to top.
PLATE 23.
Figs. 27-9, as figs. 11-14, &c., in PL 22. Figs. 30 and 32: lateral to bottom,
ventral to left. Fig. 31: median to bottom, ventral to right.