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RICHAED ASSHETON. 
any other oi’gan which is undoubtedly connected with the 
function of reproduction in the females. There is nothing 
which I could compare with Nickerson’s mammary gland, 
unless the slightly tnodified epithelium on the inner surfnce 
oF the epistome may indicate a function of this nature (fig. 9, 
m. e.). 
The male organs seem to me to be as simple as the female 
organs. There is a single follicle with duct opening on a 
papilla in the same place into the atrium, namely, between the 
intestine and epistome. The follicle contains spermatozoa 
instead of an oocyte, and there is no modification of the 
external epithelium of the atrium. 
1 am not convinced that there is any glandular mass which 
can be compared with the so-called shell-gland of L. Daven- 
port! and L. annelidicola or L. loxalina. So it will be 
seen that the reproductive system is as simple as possible, and 
remarkably different from the condition in other species oF 
Loxosoma. 
Body-wall. — The general parenchyma presents no special 
features. It is very sparsein L. saltans, and is dense where 
it occurs. In L. loxalina it is more abundant and less 
dense. There is a complete absence of any latei’al expansions 
into alte characteristic of L . Davenport! and li . an n eli d i - 
cola. The epidermis is distinct and a single layer of cells 
throughout, but varies, as we have seen, in different localities, 
giving rise to the peculiar “flask organs,” the rows of large 
cells in the stalk and the supporting sti ucture on the foot. 
The lo})hophore is drawn out into the sixteen tentacles, the 
structure of which is as follows: There is a central single 
row of dense cells, fig. 18 {mes.), round which are about five 
rows of ectodermal cells. The two outer rows are sharply 
defined, lightly staining cells, while on the inner face are 
three rows of larger cells with less well-defined boundaries. 
'I’hese three I'ows bear long stiff cilia which vibrate vigorously 
in the living specimen from time to time. On the outer 
surface there are one or two single stiff non-vibratile hairs, 
probably sense-hairs comparable to those described by Harmer 
