368 61.Spheroc. 2. THALASSIOPHYT. Pl. cell. aph. 
t planus. Thallus lentheabitees flat, broad; segments 
linear; ¢7p blunt. 
e. Mammillaris. Thallus leatherlike, channelled, forked : 
tubercles on the surface and edge, nipplelike. 
9. Spherococcus mamillosus. Nipple round fruit. 
Thallus cartilaginous, forked, long, wedgeshape, chan- 
nelled above; segments dilated; edge not cut;. thece nip- 
plelike, pedicelled on the surface and edge of the thallus; 
pedicells short. 
Fucus mamillosus, Good. Tr. Lin, Soc, 6,174; Zurn. Hist. 122; Engl. 
Bot. 1054, A 
Fucus canaliculatus 8, Huds. Fl. Angl. 583. 
Fucus ceranoides ¢, Lightf. Scot. 916. 
Fucus ceranoides, With. Bot. Arr, 4, 99. 
Fucus alveolatus, Hsper, 139, 
Fucus ceranoides 3, Gmel. 115. 
Sperococcus mamillosus, 4gardh Disp. 16. 
Sea-shores; perennial. 
8. linearis. Thallus slender, linear; tip blunt, naked. 
y. proliferus. Thallus proliferous on the surface and 
edge, wrinkled; ¢wbercles numerous, crowded, oblong, nip- 
plelike. 
3. echinatus. Segments widening upwards, nearly naked 
on one side. 
Fucus echinatus, Stackh. Ner. Brit. 65. 
s. incurvatus. Thallus nearly linear, tips rounded; éu- 
bercles nearly terminal; peduncles bent inwards. 
f. Chondrus. Thallus threadlike ai bottom, wedgeshape 
at the typ; tubercles on the edge. 
10. Spheroc.membranifolius. Membraneleaved roundfrutt. 
Thallus threadlike at bottom and compressed; tip ex- 
panded, wedgeshape; segments 2-lobed, forked ; tubercles 
globose, peduncled on the base of the thallus. 
Fucus membranifolius, Esper, 115; Zurn. Hist. 743 Engl. Bot. 1965. 
Fucus rubens, Fl. Dan. 827. 
Fucus Palmetta, Gmelin, 22. 
Sphzrococcus membranifolius, Agardh Syn. 26, 
_Delesseria membranifolia, Lamour. Thal. 
Sea-shore; perennial ; winter. 
. lacerus. Segments ‘forked; lobes linear; tip acute. 
Fucus parvus cauliculis teretibus, summitatibus membranaceis dilatatis 
et Jaceratis, Raii Syn. 44,19, excluding Morison’s synonym. 
Fucus ceraneides y, Huds. Fl. Angl. 583. 
Fucus pseudoceranoides, Gmelin, 119. 
