PLUMULARIA PINNATA. 



79 



together on the 

 main stem. They 

 are somewhat 

 pear- shaped and 

 lobed lengthwise, 

 and project more 

 or less into spines 

 in the upper part. 

 Hinck's descrip- 

 tion of this species 

 appears to be 

 rather too re- 

 stricted. There is 

 some difference be- 

 tween the deep sea 

 and the shore 

 forms, and he pro- 

 bably gave more 

 attention to the 

 former variety. 

 In the beautiful 

 specimen of the 

 shore variety exhibited, several joints occur 

 between the polypites ; and the nematophores 

 are more generally distributed than one would 

 expect to find from Hincks' description. In 



a - 



Fig. 15 



(a). A polypite of Plumularia 

 pinnata (enlarged). 



b). Showing amoeboid bodies 

 (" nematophores.") 



(c). Polypite. 



