282 
H. L. M. I'lXELr,. 
Til e V iiso- p e ri to n eal t i s s II e is developed on the walls 
of the capillaries on both sides of the body in the anterior 
coeloinie spaces, and the peritoneum covering the afferent 
vessel in the posterior ccelom is frequently greatly hyper- 
trophied. These^ latter cells, however, appear to become 
detached, so that there is generally only one layer of them 
(Figs. 13 and 15, h. 2>-)- They may possibly give rise to pig- 
ment-bearing corpuscles as suggested in the case of Ph. 
van c on ve re u s is. The contentsof the vaso-peritoneal cells 
Text-fig. 16. 
Yaso-iieritoneal cells and ova on a capillary. ( x 200.) 
appear to be identical with those already described for this 
species, similar ubsei'vations having been made with regard 
to the white pigment-grannies which in Phorunopsis 
harmeri are very noticeable (Fig. 13, j;. g ). 
There are iiuinerons ova in various stages of development 
to be found in the vaso-peritoneal tissue on both sides of 
and below the alimentary canal in all the specimens of which 
the ]iroximal ends have been cut, and they are snrronndetl by 
distinct follicle cells (Fig. 16, or., foL). Xo spermatozoa 
have been seen, nor have any ova been observed either free 
in the bod}" cavity or in the excretory ducts. 
