XXXll 



THE amateur's SYNOPSIS. 



RED SEA-WEEDS. (Rhodosperms.) 



FLAT. 



with a Midrib. 



Memhranaceous. 



Thin, leaflike; midribs throwing out leaflets 



blood-red; fruiting in winter 



without a Midrib. 



Membranaceous ; thin. 



Small; oval; leaf-like; with oval leaflets springing from 



the margins 



Fan-shaped (rarely narrow) ; veins rising from the base 



" no veins; turning orange in fresh water 

 Wedge-shaped; of various widths; purplish 

 Oblong; of various widths; margins often fringed with 



frondlets ........ 



Narrowish; repeatedly forked throughout; margins 



sometimes fringed ...... 



„ more or less forked; tips obtuse; fruit-like 



midrib-lines ....... 



Narrow ; purplish ; cut out into branches ; margins notched 



„ distantly forked; divisions wedge-shaped 

 Very narrow; rose-red; last branchlets set on one side 



only, like the teeth of a comb .... 

 Very narrow; repeatedly forked and branched upwards 

 „ stems and branches tapering to each end 

 Extremely narrow; branches repeatedly plumed and 



replumed with short branchlets and branchletee?^5; 



the latter jointed . . . . . 



Membranaceous ; tliicJc. 



Oval; rising from a short stalk .... 

 Soft; roundish; margins throwing out fronds 

 Crisp; slit into broad, wedge-shaped divisions 



„ of various widths ; margins fringed with frondlets 



Rather rigid. 



Stalked; wrinkled; margins throwing out young fronds 

 „ „ several times forked ; expanding fan- 



wise ........ 



„ roundish; horizontally laid; rooted by fibres 



from its under surface 



Stalked; branches regularly and repeatedly plumed and 

 re-plumed with short branchlets and hrsLnchleteens 



Genus, Fam. 



Delesseria XI 

 WormskioldiaXVI 



ChtlocladtaXVIII 



NlTOPHYLLUM XI 

 NlTOPHTLLTJM XI 

 RnODTMEMA XVI 



Haltmenia XVIII 

 Rhodophtllis XVI 



STET^-QGRAliME XVI 



Odoistthalia VII 

 Gracilaeia XI 



Plocamium XVI 

 euthora xvi 

 GtrateloupiaXVIII 



Ptilota 



XIX 



SCHIZTMENIA XVIII 



Kalltmen^ia XVIII 

 CallophyllisXVIII 

 Calliblepharis XI 



PhyllophoraXVIII 

 Hhodymenia XVI 

 Peyssonelta XIV 

 Ptilota XIX 



