310 MR, F. F. LAIDLAW ON THE [ Apr. 21, 
Family CryPTocELIDID&. 
BERGENDALIA ANOMALA, gen. et sp. nov. (Plate XXIII. figs. 4, 
5, 6, a 8.) 
A most remarkable and interesting form, probably allied to 
the anomalous genera Cryptocelides and Polypostia, described by 
Bergendal [1], and provisionally referred to the same family with 
them. 
The structure of the female terminal ducts is, so far as I know, 
unique, and approached only by the species referred to Z’rigono- 
porus and Polyporus (see von Plehn [11)}). 
Only a single specimen was obtained. It is rather a large 
form, with a total length of about 60 mm. and breadth about 
27 mm. The mouth-opening is some 15 mm. from the hind end, 
and the genital pores lie halfway between these two points. 
The margin of the body is complete, surrounded by a continuous 
rather dense row of eye-spots. There are none of these, apparently, 
over the brain. Hine 
Colour in the spirit-specimen uniformly greyish white (see 
Pl. XXIII. fig. 8). The specimen appears to be in an early 
stage of sexual maturity, since no trace of ovaries or testes can be 
discovered. 
The pharynx is large and much folded, the gut-branches are 
numerous and anastomose freely. 
The cells of the epidermis are elongated, especially on the dorsal 
surface. True rhabdites are absent, but in place of them the 
epidermal cells are crowded with pseudorhabdites which are of a 
coarsely granular texture, faintly stained and columnar in shape. 
In my sections (stained with Grenacher’s hematoxylin) certain 
gland-cells lying within the muscle-layers of the body-wall, 
especially on the ventral side, are deeply stained ; from these cells 
run processes which pierce the muscle-layers and basement- 
membrane, and make their way to the surface through the 
epidermal cells. These deeply-lying gland-cellsand their processes 
have rather a spongy appearance, due to their preservation not 
being quite perfect. 
Genital Organs (text-fig. 54, p. 311). 
The penis (p.) is a small fleshy organ composed of nucleated 
longitudinal fibres (Pl. XXIII. fig. 4). Its outer side is lined with 
cells continuous with those lining the antrum masculinum, but 
whereas the latter are ciliated, those covering the penis are non- 
ciliated. The base of the penis is pierced by a duct running 
nearly vertically upwards. Immediately after leaving the penis 
this is joined by two small ducts—the vasa deferentia (v.d.)— 
which run forward on either side of the middle line. In one of 
them, at the level of the hinder end of the pharynx, there is a 
slight dilatation containing spermatozoa. 
The vesicula (pr.) lying above the penis is small. Its wall 
