THE MARINE BOTANIST. 289 



spreads over the rock in patches of two feet or 

 more in extent, ^^ resembling-, " says Mrs. Griffiths^ 

 fragments of beautiful green velvet. 



67. amphibium. On turf banks, near high water, 

 but exposed to every tide, at Roundstone, and at 

 the head of Birtirbui Bay, Galway ; discovered 

 there by the late Mr. William M^Calla. ^^ Fronds 

 minute, erect cylindrical, aggregated in widely- 

 spreading strata. Colour a brilliant green, sub- 

 stance soft." — Harv.y Man., 2nd edition, p. 194. 



BRYOPSIS. 



Name meaning moss-like. 

 Frond membranaceous, filiform, tubular, cylin- 

 drical, glistening, branched; the branches imbri- 

 cated or distichous and pinnated, filled with a fine 

 green minutely granuliferous fluid. — Orev, 



