THE AMATEUR S SYNOPSIS. 
XXXI 
Gristly. 
Genus. 
Fam, 
Stalked ; spreading fan-wise above ; many times forked . 
Chondrus 
XVIII 
„ narrow ; repeatedly forked ; tips blunt ; dark red 
Gymnogongrus 
XVIII 
„ „ channelled ; spreading upwards into 
wedge-shaped divisions ; purple .... 
Gigartina 
XVIII 
Narrow stems and branches tapering to both ends, tips of 
branchletee?is blunt ....... 
Gelidium 
XII 
Shrubby ; much branched ; upper branches set with short, 
sharp, horizontally set branchleteews 
Sph^roooccus 
XI 
CYLINDRICAL {thread-shaped), BRANCHED. 
unjointed. 
Gristly. 
Dark ; solid ; repeatedly and regularly forked ; root a disc 
POLYIDES 
XIII 
,, „ „ last forkings long ; root fibrous . 
Furcellaria 
XVIII 
Irregularly forked, beset with clusters of small, oval, mem- 
branaceous leaflets ....... 
Lomentaria 
VIII 
Purplish ; wiry ; closely forked ; entangled 
Gymnogongrus 
XVIII 
„ „ distantly and irregularly branched ; en- 
tangled ........ 
Ahnfeldtia 
XVIII 
Branches strongly curved, and pointed ; branchlets few 
Gigartina 
XVIII 
Simple ; or sparingly forked ; branches simple ; short 
Cordylecladia 
XVI 
Irregularly, often slightly, branched; branches tapering 
to each end ........ 
Gracilaria 
XI 
Very bushy; often but irregularly rebranched; tips 
pointed ........ 
Cystoclonium 
XVIII 
The thickness of hogs’ bristles throughout ; forked or three 
forked; tips swollen ...... 
Gelidium 
XII 
Membranaceous and Gelatinous. 
Pale pink ; repeatedly forked ; tips blunt ; occasionally 
midribbed ........ 
SCINAIA 
XV 
Dull purple ; solid within ; irregularly forked ; clumsy 
Nemaleon 
XV 
„ tubular; stems undivided; branches long, 
simple, tapering to each end ..... 
Dumontia 
XVIII 
Purple red ; solid within ; stems undivided ; branches long, 
simple, tapering to each end ..... 
Helminthocladia XV 
Fleshy ; sometimes compressed ; branched and rebranched 
with short blunt branchlets . . 
Laurencia 
VIII 
Slender ; generally, undivided stems, set with long 
branches, clothed with very short branchlets . . Chondria 
VII 
