SUB-MARINE VEGETATION. 



93 



tank lives well and long, besides adding to its perfection. 

 When white in color reject them, as they robe themselves, 

 like true Orientals, in that color to indicate the season of 

 death. 



The Chordaria divaricata is a bright green plant, with 

 a multitude of little branches. The C fiagelliformis is a 

 deep olive, and, as its name imports, stands up like a bunch 

 of whips. 



The Callithamnion arbuscula is a bushy specimen of 

 the Algce tribe, and has all the aspect of a juvenile 

 tree. 



The C odium tomentosum is remarkable for its complex- 

 ion of light, vivid green: Each branchlet is ornamented 

 with an edging of delicate cilise, as if it were a border of 

 a daintier shade. The C, bursa belongs particularly to the 

 coast of France, and is an oddity, if nothing more inteiSn^, 

 esting. 



The Ceramium strictum grows in crimson tufts, and may 

 easily be mistaken, except in color, for a Bangia, 



The Delesseria Americana and D. sanguinea are dark 

 scarlet weeds, abundant in the environs of Hurlgate, and 

 about Boston harbor. It is a showy specimen for the 

 Aquarium, but the season enjoyed by it is much briefer 

 than many other of its species. It is, in fact, unusually 

 delicate, and a few minutes' exposure to the air imparts to 

 it that jaundiced tint which shows that death has already 

 commenced his work of destruction. The D. alata grows 

 in thin, much cut leaves of crimson. 



