ANATOMY AND HISTOLOGY OF LIMAX AGRESTIS. 163 
Coming now to my own investigations, I quite agree 
with Székely in regard to the general appearance of the 
pedal gland. As that author states, the floor is raised 
into two longitudinal folds, so that in transverse sections 
the lumen of the gland has a fungus-like outline. Fig. 3, 
Pl. XII., represents a séction in which this condition 1s 
very marked, whilst in fig. 4, Pl. XII., the resemblance to 
a fungus is rather difficult to make out. The anterior end 
of the pedal gland has, however, a different appearance. 
Fig. 2, Pl. X., gives a transverse section through the head, 
in the region anterior to the buccal cavity proper, and 
there we see that the foot is quite separated from the head 
by a transverse groove. This groove, ciliated on its ventral 
side, must be regarded as the beginning of the pedal gland. 
A few sections further back we see that the two lobes 
coming from the head, and bending down over the lateral 
parts of the foot, approach the foot still more and join it 
at last. The lumen of the pedal gland appears then linear 
in outline, while further back the floor of the pedal gland 
is raised into the above mentioned folds. Fig. 2, Pl. XI, 
shows the position and outline of this organ in the region 
of the buccal cavity. 
Further, I agree with Székely that the fungus-like 
outgrowth is covered by ciliated epithelium, of which the 
central cells are more transparent than the lateral ones, 
and further I find beneath the whole length of it, especially 
beneath the median depression, the network of extremely 
fine fibres, whose nature I was able to make out only after 
long examination, and now I fully agree with Székely 
in taking them for connective-tissue fibres, contrary to 
Sochaczewer, who thinks them to be nerve-fibres. But 
the gland cells, which according to Székely and other 
authors are so numerous in the pedal gland, are very rarely 
seen in my sections, although the few gland cells which I 
