364 59. Deless. 2. THALASSIOPHYT/. Pl. cell. aph. 
8. mimor. Thallus very narrow. 
Fucus hypoglossoides, Stackh. Ner. Brit. 176. 
— y. incrassifolia. Thallus narrow, linear; network scarcely 
visible. ; 
4, Delesseria alata. Winged delesser. 
Thallus winged, repeatedly and alternately branched; 
lobes confluent, decurrent, alternately branched. 
Fucus dichotomus parvus costatus et membranaceus, Dillen in Rati Syn. 
44, 20. : 
Fucus alatus, Lin, Mant. 1353 Engl. Bot. 1837. 
Delesseria alata, Lamour. Thal. 
Sea-shore; perennial. 
6. dilatata. Thallus broad; wings broad, waved. 
y- angustissima. Thallus very slender; wings very nar- 
row, scarcely any. 
XXXV. 60. ODONTHALIA. Lyngbye. Sea-tooth. 
Thallus flat, membranaceous,, confluent, reddish; midrib 
slightly prominent; edge toothed; sporzdia in two lines on 
solitary or clustered lanceolate marginal processes ; thece? 
pedicelled, wine-glass-shape. ‘The thecz are by some 
thought to be parasitic animals. 
Odonthalia pinnatifida. Pinnatifid sea-tooth. 
Thallus branched, alternately pinnatifid; /w7gs alternate, 
toothed at the tip, teeth short. 
Fucus dentatus, Lin. Mant. 135. 
Fucus pivnatifidus, Fl. Dan. 354. 
Delesseria dentata, Lamour. Thal. 36. 
Sphezrococcus dentatus, Agardh Syn. 22. 
Odonthalia dentata, Lyngbye Hydr. Dan. 9. 
Sea-shore; perennial; autumn. 
Thallus solitary, about 4 inches long. 
XXXVI. 61. SPHAZROCOCCUS. Stackh. Roundfruit. 
Thallus flat, membranaceous or coriaceous, confluent, 
ribless; sporidia in roundish tubercles; ¢thecé scattered 
on the surface, or on the edge. 
a. Dromius. Thallus membranaceous, ribless, tubercles flat 
on the surface. 
1. Spherococcus punctatus. Dotted roundfruit. 
Thatlus very thin, membranaceous, palmate, two-forked, 
lobes linear, tip two-cut, blunt, edge flat, tubercles oblong. 
