• Frog, morula, l.s. with macro- and micromeres
• Frog, blastula. l.s. shows blastocoel
• Frog, gastrula, sagittal l.s. shows germ layers, dorsal lip, yolk plug
• Frog, neurula, t.s. showing primordium of notochord, entoderm with primary intestinal cavity
• Frog, early tail bud stage, t.s. with neural tube, notochord
• Frog, early tail bud stage, sagittal l.s. with primordium of brain, ntestine, segmentation of
mesoderm
• Frog, hatching stage, t.s. through region of head or gills
• Frog, hatching stage, t.s. through region of midbody
• Frog, young tadpole, t.s. through head
• Frog, young tadpole, t.s. through thorax or abdomen
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