Fig. 41. Graafian follicle with two ova, about to divide into two follicles, from a rabbit six weeks after birth. Zeiss D D, ocul. 2.


DESCRIPTION OF [PLATES 27] AND [28]. (XIII. p. 618.)

Complete List of Reference Letters.

ao. Aorta. cv. Cardinal vein. gl. Glomerulus. gr1. First groove of head-kidney. gr2. Second groove of head-kidney. gr3. Third groove of head-kidney. ge. Germinal epithelium. mrb. Malpighian body. me. Mesentery. md. Müllerian duct. r1. First ridge of head-kidney. r2. Second ridge of head-kidney. r3. Third ridge of head-kidney. Wd. Wolffian duct. x. Fold in germinal epithelium.

[Plate 27].

Series A. Sections through the head-kidney at our second stage. Zeiss 2, ocul. 3 (reduced one-third). The second and third grooves are represented with the ridge connecting them, and the rod of cells running backwards for a short distance.

No. 1. Section through the second groove.

No. 2. Section through the ridge connecting the second and third grooves.

No. 3. Section passing through the same ridge at a point nearer the third groove.