the Memoirs on Loxosoma. 
399 
With regard to parts which might be regarded as belonging 
to the nervous system, Nitsche and I have only put forth 
uncertain conjectures. It is otherwise with Salensky. He 
describes a central ganglion and a paired nerve running to a 
tuft of tactile set®. He says, u The observation of the gan¬ 
glion is very difficult, as it is hidden from the eye of the 
observer by the genital organs, and by different glandules 
situated in the middle of the body. I found it very difficult 
to discover the ganglion in adult animals already possessing 
genital organs ; whilst this organ could be found without 
trouble in young individuals of which the genital organs 
were not developed.” The figures (pi. xii. figs. 2, 3), how¬ 
ever, show the ganglion in immediate contact with glandular 
bodies {gs) : which, in my opinion, can be nothing but the 
testes ; and in this connexion Salensky’s ganglion looks ex¬ 
actly like the emptied seminal vesicle. I go still further, and 
cannot but compare the two large nerves described by Salen¬ 
sky to the ducts which lead from the seminal vesicle into 
the interior of the ovaries (see my Memoir, pi. ii. fig. 8). 
Here, therefore, new observations are necessary, and the more 
as my observations upon the reproductive organs, the only 
ones extant, are not complete. 
Nitsche finds that by my statements upon these parts the 
agreement with PediceVina is fully established. Both are 
hermaphrodite. It is, indeed, not unexampled that in an 
otherwise hermaphrodite genus there may be a species with 
separate sexes ; and so Vogt’s assertion that L. phascoloso- 
matum is such a species would not be surprising in itself. 
But Vogt has not proved this. From his figures it appears 
only that he sometimes recognized the testes, sometimes the 
ovary, more distinctly, or that he has even confounded them. 
According to the following figure 1 have to correct myself, 
so far as Loxosoma pes is concerned, only in one point. In 
the ‘ Arcliiv fur mikroskopische Anatomie,’ Bd. xii. Taf. ii. 
fig. 8, I represented two divisions of the testes, but in fig. 9 
only one, on each side. With regard to this I find in my notes 
the remark, u in the lower division t' no mature semen.” As 
I shall show more clearly below, I took the germ-cell layer 
or the bud-cell-stock for a part of the seminal gland, k in the 
figure. The error arose naturally from my referring the 
foundation of the bud to the ovary (o) lying above it. No 
efferent ducts from the seminal vesicle, except the funnels 
leading into the ovaries, are known to me; nor do I know 
the efferent ducts of the ovaries. Vogt gives the following 
account of the nature and action of the seminal vesicle of his 
supposed male Loxosoma :— u I observed a male, furnished 
