F. 16, 17. Last two pairs of legs. od. Oviduct. ov. Ovary. ut. Uterus. v.c. Nerve-cord.
Figs. 34-39. Five young embryos of Peripatus capensis; ventral view. All, excepting Fig. 37, from drawings by Miss Balfour. In figures 34 to 38a denotes what is probably the anterior extremity.
Fig. 34, Stage A. Youngest embryo found, with slightly elongated blastopore.
Fig. 35, Stage B. Embryo with three mesoblastic somites and elongated blastopore. The external boundaries of the somites are not distinct.
Fig. 36, Stage C. Embryo with five somites. The blastopore is closing in its middle portion.
Fig. 37, Stage D. The blastopore has completely closed in its middle portion, and given rise to two openings, the future mouth and anus. (From a rough drawing left by Professor Balfour.) (Zeiss A, Camera Oberhaus. on level of stage.)
The following note was appended to this drawing in his handwriting: “Young larva of Peripatus capensis. I could not tell for certain which was the anterior end. Length, 1.34 mm.”
Fig. 38, Stage E. Embryo with about thirteen mesoblastic somites in which the flexure of the hind part of the body has commenced. The remains of the original blastopore are present as the mouth, placed between the second pair of mesoblastic somites, and the anus placed on the concavity of the commencing flexure of the hind part of the body.
Fig. 39. Side view of same embryo.