ANIMAL LIFE IN" THE MARINE AQUARIUM. 109 



Sb breathing apparatus. The slightest disturbance induces 

 these tentacles to withdraw themselves hastily into their 

 tubular shell, and when they do, the stopper'' follows, clos- 

 ing the orifice completely, as if with a cork. The Sabellas 

 construct their tube of mud. The Gold Comb {Ampki- 

 trile auricoma) is very curious. It ''corks up" like the 

 Serpvlce, but it has scarlet gills just below its cork-like 

 head, and across the latter article runs an appendage, from 

 the color and shape of which it has obtained its title. The 



Long Worm ; the Sea-Mouse ; the Terebellas ; the Ner- 

 eides ; the Planarice and the Sea-Leech, may be presented 

 in this company. 



The Tubularia Indivisa^ of which we give a graphic 

 engraving, is one of the most beautiful objects of the 

 Aquarium. It may be procured at Hurlgate, where it is 

 seen grouped in masses of thirty or forty together, upon 



Serpula Contortuplicata. 



