LOXOSOMA LOXALINA AXD LOXOSOMA SALTANS. 131 
counectiou with the highly developed and rather complex 
character of the movements of which the stalk of L. saltans 
at any rate is capable. 
'I’he paucity of specimens prevented me from making an 
exhaustive study of the nervous system of this interesting 
little acrobat. 
I cannot see in these cells any real resemblance to gland- 
cells. Their arrangement as a regular single file is more 
suggestive of co-ordinate action than glandular activity, 
which more usually is connected with diffuseness and irregu- 
larity of form. 
One speaks of Om foot as being an adhesive disc, and, as 
Nickerson says, containing unicellular gland-cells. I cannot 
believe that the toe-like cells which project round the edges 
of the foot are adhesive in the sense that they excrete any 
adhesive material. The rapidity and ease with which the 
animal relaxes its hold and swings its foot round and takes a 
new grip suggests a complicated nervous and muscular action, 
involving some action, such as suction, as the means of attach- 
ment rather than a simple adhesion by secretion. The so- 
called glands (fig. 13) may be of the nature of rods which 
stiffen the expanded rim of a sucking disc. One can imagine 
that such an arrangement would enable the animal to obtain 
hold and relax with great facility. 
Sense-hairs are borne by the tentacles, and upon the 
hypostome and on the lophophore at the point of its greatest 
inflection in the oral region. 
h] X c r et ory Organ s. — I endeavoured to find some evidence 
of flame-cell tubes in the living animal, and although not work- 
ing under very favourable conditions, I shall be surprised if 
such organs are found by anyone else in this species. I 
could find no trace of any ciliary action in any part of the 
animal excepting the alimentary canal and tentacles. 
Animals which have been' living some twenty-four hours 
in sea-water containing methylene-blue become generally 
coloured by the dye, but certain parts become an intense 
blue. When transferred back again into pure sea-water the 
