14 Nils Hj. Odhner. 
In a section through the ciliated crypt (fig. 8) one observes 
that a large cyanophilous gland extends from it at each side of 
the pharynx and the brain towards the back. This is the anterior 
pedal gland (described by Wirén as ,vordere Bauchdriise“ in 
Neomenia). Its structure was not studied in detail. 
Only a single fold is present in the ventral furrow, but at 
each side of it the epidermis of the furrow is somewhat raised 
thus showifig a trace of lateral folds. In these, however, the 
epidermis is cuticularized, whereas in the median fold it carries 
cilia. This fold at which the posterior pedal gland debouches, 
begins just behind the ciliated crypt. Inside its epithelium it 
contains some glandular cells and a small amount of connective 
tissue with a few fibres in its basal half. Behind the termination 
of the fold a small pit exists, lined with a folded ciliated epithelium 
of the same kind as on the fold. Immediately behind this pit the 
cloaca opens. The ventral fold, consequently, is not continuous 
as far as the cloaca but separated from it by the small invagina- 
tion, the median lamella of which seems to pass directly into the 
ventral fold. 
Neomenia differs in so far as in this genus the folds con- 
tinue uninterrupted as far as the cloaca (N. carinata, according 
to Wirén) or are effaced before reaching it (N. carinata and N. 
grandis, according to Trhiete 1902); in every case no invaginated 
pit exists in either species. 
One of the most remarkable characters of the present form 
is the large radula which is among the most extensive in the 
Solenogastres (figs. 1, 4). Only in Cyclomenia Nirrstrasz (1902) 
and Limijossor HratH (1911) has a similar relative size of this 
organ been noted, but Simrothiella offers some interesting points 
of aberrant differentiation. The radula, which occupies about a 
tenth of the body in length, consists of a median part (fig. 4, ri), 
and a lateral diverticle (rz) at each side of it extending backwards, 
tapering and terminating in a coil. The median part is formed 
by a succession of large and thick plates with a vertical extension 
and terminating in a small denticle in their upper anterior cor- 
ners. In the frontal end the teeth suddenly change form, and 
simultaneously pass into the lateral diverticula. Just behind the 
bending point each of the teeth acquires a greatly prolonged denticle, 
corresponding to the small one in the median teeth; these den- 
ticles, which as a consequence of the flexure are turned laterally 
