HYDHOID ZOOPHTTES. 45 



Having broken off with the Sertulana a piece of the shell to 

 form a base for it to stand upon, I placed it within the doors 

 of a bookcase to keep it from the dast ; about two or three 

 months afterwards I took it to a tub of rain-water for the 

 purpose of washing off the saline incrustations, and, after 

 rinsing it several times, I observed the branches begin to 

 assume a more rigid appearance, and the stem, which had 

 been previously lax and drooping, became perfectly upright 

 and rigid. If any part was drawn aside, it immediately re- 

 gained its position, and in this state it remahied nearly a 

 day before it began to droop again. I repeated the experi- 

 ment a few weeks back, with the same results." — -/. Bladon, 

 'Zoologist,^ i. p. 34. 



ANTENNULAraA ANTENNIXA. 



This is a pretty Coralline, the branches of which are finely 

 serrated and ciliated, and have a beautiful feathery appear- 

 ance. 



The genus is thus described by Johnston : — " Polypidom 

 plant-like, horny, simple, or branched irregularly; the 

 shoots fistular-jointed, clothed with hair-like, verticillate 

 branchlets; cells small, sessile, campanulate, unilateral; 

 vesicles scattered, unilateral. Polypes hydraform."' A. an- 



