G. TUBULARlA. 
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sometimes tortuous, and firmly united together at 
their lower part. 
European seas. 
MOSSY. 
4. Tubularia muscoides. Tubes nearly dichoto- 
mous, marked at certain distances with transverse 
rings ; many tubes united together, and forming very 
thick tufts. 
European seas. 
TRICHOTOMOUS. 
5. Tubularia trichoides. Tubes lightly branch- 
ing, in thick tufts, marked with rings, and of an equal 
diameter throughout ; height about a decimetre and 
half. 
European seas. 
BRANCHING. 
6. Tubularia ramosa . Tubes branching; rami- 
fications attenuated at their commencement, and 
varying in length, but marked with rings throughout, 
sometimes curved : height from five to seven centi- 
metres. 
European seas. 
dwarf. 
7. Tubularia pygmaa. Tubes isolated, marked 
with rings, somewhat flexuous, and slightly branch- 
ing; branches very short; height about a centimetre. 
On the Amphiroa Dilatata of Australasia. 
