364 59. Deless. 2 . T II A L A S S I O P H Y T IE. Pl.cell.opk. 
minor. T/iallus very narrow. 
Fucus hypoglossoides, Stackh. Ner. Brit. 176. 
y. incrass folia. Thallus narrow, linear; network scarcely 
visible. 
4. Delesseria alata. Winged delesser. 
Thallus winged, repeatedly and alternately branched; 
loles confluent, decurrent, alternately branched. 
Fucus dichotomus parvus costatus et membranaceus, Dillen in Rail Syn. 
44, 20. 
Fucus alatus, Lin. Mnnt. 135 ; Engl. Bot. 1837. 
Delesseria alata, Lamour. Thai. 
Sea-shore; perennial. 
& dilatata. Thallus broad ; wings broad, waved. 
y. angustissima. Thallus \e ry slender; wings very nar- 
row, scarcely any. 
XXXV. 60. ODONTH A LIA. Lyngbye. Sea-tooth. 
Thallus flat, membranaceous, confluent, reddish'; midrib 
slightly prominent ; edge toothed ; sporidia in two lines on 
solitary or clustered lanceolate marginal processes ; ihecceP 
pedicelled, wine-glass-shape. The tliecse are by some 
thought to be parasitic animals. 
Odonthalia pinnatifida. Pinnatifid sea-tooth . 
Thallus branched, alternately pinnatifid; twigs alternate, 
toothed at the tip, teeth short. 
Fucus dentdtus, Lin. Mant. 135. 
Fucus piunatifidus, FI. Lfyn. 354. 
Delesseria dentala, Lamour. Thai 36. 
Splia?.rococcus dentatus, Agardh Syn. 22. 
Odonthalia dentata, Lyngbye Hydr. Dan. 9. 
Sea-shore; perennial; autumn. 
Thallus solitary, about 4 inches long. 
XXXVI. 61. SPR/EROCOCCUS. Stackh. Roundfruit . 
Thallus flat, membranaceous or coriaceous, confluent, 
ribless; sporidia in roundish tubercles; thecce scattered 
on the surface, or on the edge. 
a. Dromius. Thallus membranaceous , ribless, tubercles flat 
on the surface. 
1 . Sphcerococcus punctatus . Dotted roundfruit. 
Thallus very thin, membranaceous, palmate, two-forked, 
lobes linear, tip two-cut, blunt, edge flat, tubercles oblong. 
