179 SEA AfOSSES. 



iilca of ihc plant than can \>c conveyed by anv words. 

 Il has one unmistakable mark which will « a 



it from every other memU-r of the family, viz. : the 

 fact that all the [urts and IoIkts arc armed along 

 ihcir edges with shar]>, forward-jK)inting teeth. In 

 all the older i>arts, a midrib is very distinctly seen, 

 which loses itself at last near the mid«lle, or toward 

 the younger parts of the frond. My largest s|K( imens 

 are eight in< hes in Literal spread, and something less 

 in height ; color, a dull or brownish red. It is common 

 along the wlwile coa^t, and at S.mta llarlxara, it is 

 reiK>rted growing in ileep water ne.ir ih'- wh.irf. and 

 on brge ro*ks at low-tide, and at San I>i«.i,", •»» <'^^i> 

 water, fnim November to .Xpnl. 



NllUPHVlXLM KlIRFCllTEANUM, AC. 



Tliis is a fine, large and well marked species. 

 Starting from a narrow stem, it soon cxi)ands into a 

 rei>cate<lly forking, widely spreading frond from one 

 to two feel long. Hie strap like lobes of the frond 

 arc from half an inch to one inch wide, of various 

 lengths, of nearly i»arallel e«lges. rounded and often 

 cleft at the top. Hie edges of all the older parts of 

 the fron<l. an<l of any old breaks in it, arc bordered 

 with a fringe of minute leaflets, not more than one- 

 eighth of an inch long. Sometimes these extend over 



