384 The Scottish Naturalist. 



V. Thuretii Woron. " Bot. Zeit," 1869. 



Filaments 0,07 — 9 m.m. broad, Oogonia, inclined, 0,13 — 21 

 m.m. broad; oospores 0,12 — 20 m.m. broad, by 0,17 — 24 m.m. 

 long. Antheridia oval, sometimes more or less oblique, 0,04 — 5 

 m.m. broad, by 0,06 — 8 m.m. long. 



All the submarine Vaucherice can grow together, but often some 

 species (V. dichotoma, (Lin.) Ag., V. litorea) are to be found at 

 lowest tide mark, V. sphaerospora between tide marks, generally 

 above half tide level, V. Thureiti, intermedia and coronata higher 

 up, and V. synandra highest (sometimes among grass). V. 

 sphaerospora can grow in spread threads on sand or in dense 

 masses on mud. According to Woronin, in " Bot. Zeit," vol. 27, 

 V. piloboloides grows in deeper water than the above-mentioned 

 species (probably in quite salt water). 



All the measures are taken from British specimens. 



[Vaucheria omithocephala Agardh " Synops. Algar. Scandin," 

 181 7, is an older name than V. sericea Lyngbye "Hydroph Danise," 

 181 9. It is not certain that V. sericea, Lyngb. is the same species 

 as V. sericea, Walz, and auct. recent.] 



EXPLANATION OF PLATE. 



Fig. 1 — 3. Vaucheria litorea Hofm. Bang et Ag. 



1 — 2. With antheridia ; 3, with a long but slender oogonium, 

 4 — 7. V. sphaerospora Nordst. 

 5 — 6. Monstrous form of oogonia. 



7. Not quite common form of antheridia. 

 8 — 9. V. Thuretii, Woron. 

 10 — 11. V. Synandra, Woron. 



11. — With two young androphores. 

 Lund, 5th June, 1886. 



Owing to press of matter we have been forced to hold over till next number 

 Report upon the Fishes of the East Coast of Scotland, by Dr. Howclen ; 

 Report on Fungi of the East of Scotland, by Professor Trail ; A 

 Curious Lichen from Ben Lawers, by Dr. Stirton ; Obituaries of 

 Dr. Ogilvie- Forbes, and of Rev. James leter of Old Deer ; 

 Mycologia Scotica, Supplement ; and several reports of articles in 

 journals, reviews, &c. 



ERRATA. 

 In the July No. of this Magazine, p. 308, line 8 from top, instead of "brown, 



with the exception of the tail, which has," &c, read "brown, which, 



with the exception of the tail, has," &c. 

 P 312, line 14 from top, sub Taxus baccata, delete "89,'' inserted by a 



copyist's error. — [Ed. Scot. Nat.] 



