151 
A few words arø neøded as to the, other organization of this 
Polyclad, as nothing is hitherto known regarding it. Generally 
speaking it shows an agreement with structures 
occurring in the Stylochids. The epidermis has, 
especially on the dorsal side, a very large 
amount of large-granular eosinophil giand cells, 
the rhabdites being scarce in agreement with 
several Stylochid genera. The muscular wall of 
the body is built up of coarse, densely gathered 
fibres. In regard to the layers, one notices that 
the ventral inner longitudinal layer has a rather 
weak appearance. On the dorsal side the 
muscularis never attains the thickness of the 
epithelium. Being in marked degree superficially 
located, the pigment patches are chiefly limited 
to the muscle layers. They never occur in or 
outside the basement membrane. This membrane 
has a homogeneous, gelatinous-looking struc- 
ture. The outer and greater part of it is in 
hematoxylin-eosin preparations stained a light 
blue, while the interior part becomes strongly 
imbibed with eosin. The dorso-ventral system 
of fibres is extremely richly developed, but the 
fibres are never coarse. The mouth is situated 
posterior to the beginning of the third part of 
the pharyngeal pocket (text-fig. 31), and the 
pharynx is richly folded as is usual in a Stylo¬ 
chid. The pharyngeal pocket is in itself not a 
broad tube but is provided with deep side- 
pockets. This condition is at least to some 
degree visible on the photograph of the animal 
<Plate III, Fig. 17). This is also the case as 
regardsthe uteri,which extend assinuous,unbran- 
ched canals somewhat more anteriorwards than 
the pharynx. The collections of eggs in them 
make them conspicuous (Text-fig. 31). The main 
intestine is not narrow above the pharynx, and has scarcely any 
Minot’s giand cells on its ventral, though numerous ones on its 
vv 
Text-fig. 31. 
Enterogonia pigrans 
vai’. novæ-zealandiæ. 
The median region of 
specimen in cedar- 
wood oil as it appears 
in ventral aspect. Phar¬ 
yngeal chamber, fold 
of pharynx (phf) 
protruding through the 
mouth, Shell giands 
(as short lines), sexual 
^ pores and the uteri 
filled with eggs. 
