THE MARINE BOTANIST. 11 



CYSTOSEIRA ERICOIDES.— HEATH- LIKE 

 CYSTOSEIRA. 



A rig-id and very bushy sea-plant^ thickly set 

 with small spine-like ramiilij or leaves; the air- 

 vessels are small, and mostly solitary, in the upper 

 branches. Colour olive-gTeen ; but when seen 

 g-rowing" under water, appears clothed in the most 

 beautiful iridescent hues. The root is a very hard 

 disk, and the fronds are from one to two feet in 

 length. Perennial. Summer and Autumn. Grows 

 on rocks between tide-marks; frequent along* the 

 shores of Devon and Cornwall, and the western 

 and southern coasts of Ireland. Yarmouth Beach. 

 Bill of Portland. Port Rush, north of Ireland. 



CYSTOSEIRA GRANULOSA. — GRANU- 

 LATED CYSTOSEIRA. 



Stem seven or eight inches high ; branches 

 slender, and much divided, with hard knob-like 

 substances at the base of each; this latter cha- 



