DEVELOPMENT OF THE CAPE SPEOIES OF PERIPATUS. 175 
The Development of the Cape Species of 
Peripatus. 
By 
Adam Sedgwich, Mi.A., 
Fellow of Trinity College, Cambridge. 
PAt. Of. 
With Plates XII, XIII, and XIV. 
THe SEGMENTATION OF THE Ovum AND ForRMATION 
OF THE LAYERs. 
UNSEGMENTED UTERINE Ova. 
THE ovum is composed of a spongework (Pl. XIII, fig. 18), 
the strands of which consist of an apparently hyaline and 
structureless material and contain a small number of highly 
refractile globules of various, but always small, size. Glo- 
bules of a similar nature are also found in the spaces of the 
spongework. 
In the ovum of Peripatus Balfouri, and to a much 
smaller extent in the ovum of P. capensis, a number of angular 
bodies, staining slightly deeper than the rest of the reticulum, 
and in unstained specimens having a somewhat yellow tint, are 
present (Pl. XIII, fig. 19, s.d.). At first I took these struc- 
tures for a kind of yolk material contained in the meshes of 
the spongework, but a more careful examination has led 
me to believe that they are merely nodal expansions of the 
latter; they undoubtedly present the appearance of being 
continued at their angles into the strands of the reticulum 
(Pl. XII, fig. 1, s.d.). The property which they possess of 
