PI. cell.aph, 2.THALASSIOPHYTiE. 62. Gigart. 37 5 
9. Gigartina Griffitsice. Griffith's plum-weed. 
Thallus cartilaginous, cylindrical, threadlike, forked, 
level-topped ; tubercles lateral, oblong, embracing the 
thallus. 
Fucus Griffitsiae, 'Turn. Hist. 126; Engl. Hot. 1926. 
Sphaerococcus Griffitsise, Agardh Disp. 
Gigartina Griffitsia?, Lyngbye Hydr. Dan. 43. 
Sea-shores; October to December. 
Thallus 2 or 3 inches high, purplish ; tubercles composed 
of horizontally radiating filaments. 
10. Gigartina acicularis. Needlelike plum-weed. 
Thallus rather cartilaginous, soft, threadlike, irregularly 
dichotomous; branches spreading, pointed; twigs scattered, 
short, spearshape, horizontal. 
Fucus acicularis, Turn. Hist. 126. 
Splufirococcus acicularis, Agardh Disp. 17. 
Sea-shores; winter. 
Thallus 2 or 3 inches long; above slightly flattened. 
11. Gigartina con fervoidcs. Conferva plum-weed. 
Thallus threadlike, much and irregularly branched ; 
branches long, mostly simple; twigs scattered, bristlelike, 
narrower at each end ; tubercles hemispherical, scattered. 
Fucus inarlnus purpurascens parvus, caule et ramulis sen foliolis tereti- 
bus, Ruii Syn. 50, 60. 
Fucus confervoides, Lin. S. P. 1629 ; Engl. Bot, 1669 ; Turn. Hist. 84. 
Fucus elongatus, FI. Norv . 2, 143. 
Fucus verrucosus, Huds. FI. Angl. 583. 
Fucus acerosus, Espcr , 103. 
Fucus longissitnus, Gme.l. 134. 
Gigartina confervoides, Lamour. Thai. 48. 
Sphaerococcus confervoides, Agardh Syn. 35. 
Sea-shores ; perennial ; September and December. 
<3. procerrima. Branches very long, mostly simple, rather 
naked. 
Fucus teres rubens minus ramosus in longum protensus, Dillen in Raii 
Syn. 51,53. 
Fucus procerriinus, Espcr, 133. 
Fucus longissimus, Wolf. Jacq. Coll. 1,361. 
Ceramium longissimum, Roth Cat. 3, 116. 
y. amplexa. Thallus entangled ; branches and twigs very 
numerous, crowded, twisted. 
8. gracilis . Thallus threadlike; tubercles lateral, clus- 
tered, minute, flaccid towards the tips. 
Fucus gracilis, Stackh, Ner. Brit. 100. 
