Flustra. ZOOPHYTA. FLUSTRADiE. 537 
147. F. pilosa. — Cells rather remote, nearly circular, the 
margin with numerous inflected teeth. 
Eschara millepora, Ellis^ Coral. 73. t. xxxi. — F.pil. Linn. Syst. i. 1301. — 
F. lineata, Fah. Fauna Groen. 437 — Common on fuel. 
This species invests the stalks of narrow-leaved marine plants, and some- 
times appearing as if foliaceous, with cells on both sides ; the cells below are 
gibbous, and the intervening spaces are covered with pellucid points ; the 
teeth vary in number, from six to eight, the one near the base is usually pro- 
duced into a long simple hair, giving the whole a hispid appearance. When 
this long hair is absent, the coralline has been termed Flustra dentata (Sol. 
Ellis, Zooph. 15.), and is figured by Ellis (Phil. Trans. 17^3, 631. t. xxii. f. 4.) 
with the base of the polypi tubular, and the head with twelve tentacula. 
148. F. hispida. — Substance fleshy, cells remote, aperture 
contracted ; armed at the top with spinous processes. 
Fab. Faun. Groen. 438. Jameson^ Wern. Mem. 563. — Investing Fucus 
serratus ; ^very where common. 
Substance thick, tough, full of mucus ; brown ; base of the cells, where 
attached, contiguous and angular ; at the surface the cells are ovate, the 
aperture lunate ; polypi Avith an enlarged head, and from twenty to thirty 
tentacula. The F. hispida of Pallas is a different species. 
