G. AMPHIROA. 
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form of the articulations and by the division of the 
branches. 
Their organisation and colour resemble those of 
the Corallinas. 
Their height does not appear to exceed a decimetre. 
They are said to originate from the Antilles, and 
chiefly from J amaica. 
BEARDED. 
1. Cymofolia barbata. Dichotomous; articula® 
tions cylindrical ; branches with hairs at their extre- 
mities. 
Coast of .Jamaica. 
NECKLACE-FORMED. 
2. Cymopolia rosarium . Articulations nearly 
globular, the lower cylindrical ; separated from each 
other by a very small interval. 
Caribean sea. 
AMPHIROA. 
Plant-like and articulated ; branches dispersed, 
dichotomous, trichotomous, or verticillated ; articu- 
lations long, and separated from each other by a bare 
and horny substance. 
The Amphiroas resemble the Corallinas in the sub- 
stance both interior and exterior of the articulations ; 
their colours exhibit the same hues ; their height is 
