76 BRITISH HYDROID ZOOPHYTES. 



somewhat irregularly. The stems and the 

 branches throw out at the nodes, delicate 

 radiating offshoots, bearing receptacles on the 

 upper sides. These are similar to the 

 receptacles of the last species, but the nodes 

 are much closer, and there is some variation 

 in the distribution of the nematophores. The 

 capsules are horn-shaped, a drawn out and 

 curved variation of those of the last species. 

 The stem and branches of this species will 

 repay microscopic examination. A transverse 

 section (see fig. 13) shows many other tubes 

 of various shapes and sizes running parallel 

 with, and arranged around, the main tube, 

 pressed tightly against each other, and 

 annealed together. Many of these tubes open 

 into those adjoining and into the main tube ; 

 the ccenosarc, therefore, is uninterrupted. 



Not uncommon on the scallop valves in 

 deep water. 



Aglaopkenia pluma, Linnaeus. (Plate X.) 



2 dry specimens, also 1 in liquid and 1 in box. 



specimens After storms, when sea- 



74, 75, 76, 77. weed in large quantities is 

 thrown upon the beach, A. pluma may fre- 

 quently be found on Halidrys siliquosa, 



