2 LILIAN SHELDON. 
complete series, as the preservation was in almost all cases 
satisfactory. 
All my material was provided for me ready preserved by 
Mr. Sedgwick, who also placed at my disposal a number of 
series of sections which he had cut of the early stages of the 
Cape species. For this kindness, as well as for much valuable 
advice and assistance which he gave me throughout my work, 
I wish to express my very sincere thanks. 
PERIPATUS CAPENSIS. 
Structure of the Ovary.—The ovary has the same 
general anatomical structure in all the species of Peripatus in 
which it has been hitherto described. 
In P. capensis it consists of a pair of tubes lying parallel 
to one another and to the long axis of the body, and uniting 
anteriorly, where the ovary is attached to the ventral wall of 
the pericardium. Posteriorly they also unite into a short 
common duct, which almost immediately divides into the two 
oviducts. 
The epithelial lining of the ovary is of two kinds (v. fig. 1). 
On the inner side of each tube it is thin and flat, with very 
distinct nuclei; while on the outer it is very thick (figs. 1 and 3). 
It is this thick mass which is the germinal epithelium. 
Towards the end of April, i.e. shortly after all the ova have 
passed from the ovary into the uterus, the germinal epithelium 
forms a very thick mass, consisting of protoplasm with nuclei, 
and the remains of spermatozoa scattered through it (fig. 1). 
The protoplasm shows no cell outlines even when examined 
under a high power of the microscope, and is then seen to 
consist of a loose, irregular, spongy mass. A small portion of 
the ovarian wall at the junction of the germinal with the thin 
epithelium is shown in fig. 2, which was drawn with Reichert’s 
;j; oil immersion lens ; on the side which lies towards the body 
cavity there is an irregular layer of nuclei lying more or less 
parallel to the surface, and on that which is directed towards 
