Fig. 30. Ovum of Raja with follicular epithelium. Zeiss C, ocul. 2.
Fig. 31. Small portion of a larger ovum of Raja than fig. 30. Zeiss D D, ocul. 2.
Fig. 32. Follicular epithelium, &c., from an ovum of Raja still larger than fig. 31. Zeiss D D, ocul. 2.
Fig. 33. Surface view of follicular epithelium from an ovum of Raja of about the same age as fig. 33.
Fig. 34. Vertical section through the superficial part of an ovary of an adult Raja to shew the relation of the pseudo-epithelium to the subjacent stroma. Zeiss D D, ocul. 2.
Complete List of Reference Letters.
do. Developing ovum. fc. Cells which will form the follicular epithelium, fe. Follicular epithelium. ge. Germinal epithelium. mg. Malpighian body. n. Nest of cells of the germinal epithelium. nd. Nuclei in the act of dividing. o. Permanent ovum. ov. Ovary. po. Primitive ovum. t. Tubuliferous tissue, derived from Malpighian bodies.
Fig. 35. Transverse section through the ovary of an embryo rabbit of eighteen days, hardened in osmic acid. The colours employed are intended to render clear the distinction between the germinal epithelium (ge.) and the tubuliferous tissue (t.), which has grown in from the Wolffian body, and which gives rise in the male to parts of the tubuli seminiferi. Zeiss A, ocul. 2.
Fig. 35A. Transverse section through a small part of the ovary of an embryo from the same female as fig. 35, hardened in picric acid, shewing the relation of the germinal epithelium to the subjacent tissue. Zeiss D D, ocul. 2.