Fig. 31. Through anterior part of trunk.
Fig. 32. Through the trunk somewhat behind fig. 31.
Fig. 33. Through tail region.
Fig. 34. Further back than fig. 33, shewing constriction of tail from the yolk.
Figs. 35-37. Transverse sections through an embryo on the eighth day after impregnation.
Fig. 35. Through fore-brain and optic vesicles.
Fig. 36. Through hind-brain, shewing closed auditory pits, &c.
Fig. 37. Through anterior part of trunk.
Fig. 38. Section through tail of an embryo on the ninth day after impregnation.
Plate 37.