352 DR. SARAH M. BAKER AND MISS M. H. BOHLING ON 
sometimes singly under the axes of the segments, or (especially in small 
forms) absent, hard, spherical or ovoid, equally swollen on both sides ; 
irregular blister-like swellings also often present. Cryptostomata scattered 
over the wings of the thallus. Fruit-bodies mostly egg-shaped or oblong, 
sometimes pointed, simple or forked, compressed or swollen. Dicecious. 
Megecad LIMICOLA., 
Thallus not attached by dise. Reproduction by vegetative budding. 
Receptacles rare or absent. 
Section 1. Salt-marsh forms. 
Thallus embedded in mud. Cryptostomata chiefly marginal, numerous, 
and prominent. Receptacles, when present, strictly terminal. 
(a) Ecad volubilis (Turner) S. M. Baker. 
Frond much spirally twisted, very variable in size and form, 4-80 ems. long 
and 1-16 mm. broad; margin smooth ог waved. Vesicles numerous in 
larger plants, but often absent or few in smaller ones. Receptacles elon- 
gated, oblong or almost pointed, occurring at the ends of the fronds, hardly 
broader than the rest of the thallus, turgescent with or without mucilage, 
from 1-3 ems. in length, simple or bifid, rare.  Diœcious; oogonia not 
dividing into oospheres ; length of paraphyses variable. 
Hab. Embedded in lower levels of muddy salt marshes. Coasts of Essex : 
Fambridge Ferry, Blackwater Estuary; Norfolk: Wells, Blakeney ; Hants: 
Isle of Wight, Hurst Castle, Lymington. U.S. A.: Connecticut, New 
York. French coasts : Arcachon, Iles Chansey. Spain: San Vincente de 
la Barquera. Spitzbergen. 
Fucus volubilis, Hudson, Flora Angl. ed. 2, р. 577 (London, 1778); 5. M. 
Baker, in Journ. Linn. Soe., Bot. xl. (1912) pp. 283-288, figs. 5, 6, & 8. 
Fucus volubilis v. flexuosus, Ñ. M. Baker, |. c. fig. 7. 
Fucus vesiculosus у. volubilis, Turner, Synopsis of British Fuci, vol. i. 
рр. 120 & 127 (London, 1802). Eas. Goodenough & Woodward. 
Fucus spiralis v. volubilis, Batters, in Journ. Dot. xl. (1902) Suppl. p. 50. 
Fucus lutarius, Kützing, Tab. Phye. 1860, Bd. x. p. 7, and tab. 17 iii ; 
Sauvageau, Soc. Biol. Bordeaux, 1908, figs. 16-19, рр. 106-160, 
Fucus vesiculosus v. lutarius: Has. Chauvin, Algues de la Normandie ; 
Hohenack, Meeresalgen, No, 522. 
Fucus axillaris у. spiralis, J. G. Ag. “ Bidrag till künnedomen af Spets- 
bergens Alger," in Kong. Svensk. Vetensk.-Ak. Handl., Ny Fóljd. vol. vii. 
n, 8 (Stockholm, 1868) p. 43. 
Fucus vesiculosus v. spiralis, Farlow. Collins, in Rhodora, vol. vii. (Boston, 
1905) p. 229. Киз. Phye. Boreali-Americana, по. 680. Johnson & 
York (1915) р. 62, pl. 16. 
