PL cell, aph. 2.THALASSIOPHYTiE. 61.Sphseroc. 367 
7. Sphccrococcus Norvegicus. Norway roundfruit. 
Thallus cartilaginous, forked, veinless; segments linear; 
edge not cut; tip blunt; tubercles hemispherical. 
Fucus Norvegicus, Turn. Syn. 222 ; Engl. Bot. 1080. 
Fucus crenulatus k. Turn. Tr. Lin. Soc. 17, 131. 
Fucus polymorphic, var. Lamour Biss. 
.Sphaerococcus Norvegicus, Agardh Disp. 15. 
Chondrus Norvegicus, Lyngbye Hydr. Dan. 16. 
Sea-shore; perennial; March. 
8. Sphcerococcus crispus. Crisp roundfruit . 
Thallus cartilaginous, forked, crisp, palmate; segments 
dilated ; edge not cut ; tubercles solitary, immersed in the 
tip of the thallus. 
Fucus membranaceus, ceranoides varie dissectus, Raii Syn. 44, 16. 
Fucus membranaceus ceranoides ramosus, per siccitatem obsolete vi- 
rescens, Dillen in Raii Syn. 44, 17. 
Fucus crispus, Lin. Mant. 134. 
Fucus ceranoides, Huds. FI. Angl. 582. 
Fucus polymorphic, Lam. Essai. 
Sphserococcus crispus, Agardh Syn. 24. 
Ulva crispa, De Candolle FI. Tr. 2, 15. 
Sea-shores; perennial; October to May. 
£. virens. Thallus rather membranaceous; segments 
widening at top, flattish ; lobes long, pointed. 
y. stellatus. Thallus rather leatherlike; segments widen- 
ing at top; tip divided into many short, clustered lobes. 
Fucus stellatus, Stackh. Ner. Brit. 53. 
cequalis. Thallus cartilaginous, thick ; segments all 
equal, linear; lobes blunt. 
Fucus crispatus, FI. Dan. 326. 
Fucus crispus, Stackh. Ner. Brit. 12. 
Fucus foliifer, Esper , 106. 
e.Jiliformis. Thallus cartilaginous, compressed; segments 
linear, flat; lobes long, acute. 
Fucus filiformis, Huds. Ft. Angl. 585. 
Fucus ceranoides albidus, ramulorum apicibus stellatis, Dillen in Raii 
Syn. 44, 18. 
£. patens . Thallus rather cartilaginous, linear, here and 
there channelled ; angles of the forks spreading. 
Fucus patens, Lin. Trans. 3, 173. 
y\. lacerus. Thallus cartilaginous, compressed; tip very 
narrow, long, lobed. 
Fucus lacerus, Stackh. Ner. Brit. 11. 
Q. Sarniensis . Thallus leatherlike, cartilaginous ; seg- 
ments here and there rather channelled, dilated ; tip round- 
ed, nicked. 
