136 CLASS II.— ORDER 11. 



rose, violet, and green ; height from six to eight cen- 

 timetres. — Plate 11. fig. 3. 

 Australasia. 



DILATED. 



6. Amphiroa dilatata, Dichotomous, and very 

 stiff; branches almost divergent; articulations very 

 distant, frequently with a small round swelling at 

 the extremities, cylindrical in the lower part, com- 

 pressed in the middle, and becoming nearly flat at the 

 summits ; generally of unequal breadth ; colour va- 

 riegated with green, red, and violet ; height from fiye 

 to seven centimetres. 



Australasia. 



DE BEAUVOIS'S. 



7. Amphiroa Beauvoisii. Dichotomous; stem 

 cylindrical ; branches compressed ; extremities nearly 

 flat; much smaller than the preceding in all its 

 parts. 



Coast of Portugal. 



CUSPIDATED. 



8. Amphiroa cuspidata. Generally tetrachoto- 

 mous, but sometimes having only two or three divi- 

 sions ; articulations long, cylindrical, and pointed at 

 the extremities. 



American seas. 



WARTY. 



9. Amphiroa verrucosa. Trichotomous or subver- 

 ticillated; articulations swelled at each extremity, 

 cylindrical, and almost wholly covered with warty 



