PHYSOPHORIDAL. 



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. 



■T:/:. 



. lii 



Fig. 43. — Apolemia contorta, one-third natural size (Milne- Edwards). 



The nursing polvps have been called proboscidifcrous 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 



J 2 



