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UK HARD ASSHETON. 
acMMss tlie species again, so that I have not seen it alive. 
'I’he Malclanid worm was the only one obtained, and that was 
got some feet below low-water level of a spring tide. 
Nervous System. — The only part of a nervous system 
observed is the paired ganglionic mass which lies between 
the intestine and the reproductive gland as shown in fig. 3, 
in a position corresponding exactly with that of L. saltans, 
fig. 14, and other species. 
Plxcretory System. — The poor histological condition of 
the specimen makes it very difficult to determine the 
character of the excretory organs. There are certain struc- 
tures which are probably of that nature which lie in the body 
just above the glandular expansion of the stomach. Firstly, 
there is a pnir of large rounded masses of deeply staining 
cells which have rather the appearance of yolk-glands or 
testis, and are no doubt part of the reproductive system (tig. 
6). Closely applied to these and extending from them to the 
skin are very peculiar cells arranged in tiers, pagoda-like, as in 
fig. 1 {k.), and fig. 6 {k.), the larger cells being at the bases. 
Next the skin are some small rounded cells. It is not possible 
to make out a duct, nor is it easy to make these structures cor- 
respond with anything hithei’to described as excretory organs 
of polyzoa. Nevertheless, as will appear in the next section, 
it seems to me possible to derive them for the structure which 
must be regarded as excretory organs in L. saltans. 
Reproductive system . — This consists of a pair of large 
gonads (figs. 1 [p.] and 4 [p.] ), from which wide ducts run 
inwards towards a mass of large granular cells lying in 
the median plane just behind the nerve ganglion and 
oesophagus. This mass may be of the nature of a shell-gland 
(c f. Nickerson), or possibly a yolk-gland, and from it a single 
median duct runs to open into the atrium between the 
episfome and the lophophore. 
The gonads are not very well preserved, but at any rate I 
can say that each is a more or less spherical sac with thick 
walls and a small centi-al cavity from which the gonoduct runs. 
'I'he walls bear the reproductive cells, and I am inclined to 
