G. AMPHIROA. 
137 
points ; colour, a greenish rose ; height from three to 
four centimetres. — Plate 11. fig. 4. 
Australasia. 
INTERRUPTED. 
10. Amphiroa interrupta. Branches verticillated ; 
articulations of the principal branches separated by 
long and unequal intervals ; these intervals approxi- 
mate in the secondary branches, and touch in the 
small ones ; colour, a reddish green ; height from three 
to four centimetres. — Plate 11. fig. 5. 
Australasia. 
MANED. 
11. Amphiroa jubata. Branches verticillated ; 
articulations of the principal branches very thick ; 
those of the verticil very small, unequal, and hair-like ; 
colour inclining to red ; height from four to six centi- 
metres.— Plate 11. fig. 6. 
Australasia. 
CHAROIDAL. 
12. Amphiroa charoides. Branches verticillated, 
with verticils of small branches at each articula- 
tion ; articulations cylindrical, long, and unequal ; 
the surface warty or with tubercles ; colour, an 
earthy yellow ; height a decimetre. 
Australasia. 
BRIERY. 
13. Amphiroa tribulus . Articulations cylindrical, 
compressed, or sharp-edged. 
American seas. 
Cor. s 
