148 THE MARINE BOTANIST. 



JANIA. 



Named from Janira, one of the Nereides. 



Frond filiform, articulated, dichotomous, branched, 

 coated with a calcareous deposit. Fructification, 

 urn-shaped 5 ceramidia, fn med of the axillary arti- 

 culation of the uppermost branches (mostly two- 

 horned), containing" tetraspores. 



JANIA RUBENS.— RED JANIA. 



Grows in tufts of half-an-inch to two inches in 

 height, on the smaller algse between tide-marks. 

 Branches slender, repeatedly forked. ^^Articula- 

 tions cylindrical in all parts of the frond, without 

 prominent angles ; those near the base very short, 

 the upper ones gradually longer." Ceramidia urn- 

 shaped with long horns. The colour is a pale red, 

 with purplish shades when quite fi'esh. Perennial. 

 Summer. Common. 



0. S. G, corniculata. Grows on the smaller 



