Puate CCCL. 2B. 
VAUCHERIA SUBMARINA, Bert. 
Vaucneria submarina; “forked fastigiate threads ; coniocystee (sporangia) 
numerous, lanceolate and ovate, confined to the upper branches.” 
Berkeley. 
VAUCHERIA submarina, Berk. Gl. Br. Alg. p. 24. t.8. Hook. Br. Fl. vol. ii. 
p- 319. Hook. Man. ed. 1. p. 147. ed. 2. p.195. 
VaucHeEriA dichotoma, 8. submarina, 4g. Syst. Aly. p. 171. Sp. Alg. vol. i. 
p- 460. Lyngb. Hyd. Dan. p. 76. t.20. A. Grev. Alg. Brit. p. 190. 
Has. On the muddy sea-shore. Weymouth, Rev. I. J. Berkeley. 
Groer. Distr. North Sea. 
Duscr. “ Plant growing in dense fastigiate masses in muddy spots covered by 
the sea every tide. Threads far slenderer than in Vaucheria dichotoma, 
stained below by the mud, above dark green, forked ; the branchlets generally 
somewhat strangulated just above their insertion; the main stem clothed, - 
above the part where the branchlet is given off, with numerous, almost 
sessile, more or less ovate or lanceolate coniocyste, which are pointed, at 
first entirely green, but eventually with a pellucid border. One single 
instance occurred, in which the /ruz consisted of two, placed end to end.” 
Berk. 1. ¢. 
I am only acquainted with this species through Mr. Berkeley’s 
description and figure, both of which I have here, with his per- 
mission, made use of. 
B. Fig. 1. Tuft of VaucHErta suBMARINA :—the natural size. 2. Filaments 
in fruit :—magnified. 3. A portion of a filament with sporangia :—more 
highly magnified; both copied from Mr. Berkeley’s plate. 
