80 BRITISH HYDROID ZOOPHYTES. 



the shore variety, there is one nematophore 

 above and one below each polypite, and in 

 many cases, either one or two in the axils of 

 the branches. There seems also to exist 

 considerable variation in the development of 

 the capsular spines, so that one can hardly 

 help recognizing the close connection of the 

 three species, pinnata, echinulata, and similis. 

 A rather poor specimen of the deep sea form 

 is exhibited. This form is somewhat rare, but 

 the shore variety is common in rock pools 

 from mid to low tide. 



Plumularia setacea, eihs. 



1 specimen in liquid on Antennularia stem. 



specimen Extremely delicate, branches at a 

 81. less open angle than the last 



species ; the capsules are elongated spindle 

 shape, quite distinct from other forms, and are 

 produced in the axils. They are decidedly 

 the best specific character Nematophores 

 plentifully distributed. Rare at Hastings. 

 Not observed as a shore form. 



