PHYSOPHORIDE. 131 
it is of a fine rose tint, and flattened into the form of a ribbon; it is 
marked in all its length with asperities or hollow dimples, in which 
the filamental appendages originate. 
Fig. 43.—Apolemia contorta, one-third natural size (Milne-Edwards). 
The nursing polyps have been called probsscidiferous organs by 
M. Milne-Edwards, who has studied them carefully. They are 
rendered conspicuous at a glance by the bright-red colour of their 
digestive cavity and their extreme dilatability. At the base of their 
stems the very delicate filaments called fishing-lines are attached 
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