100 THE BOTANICAL MAGAZINE. t^ol. xxix. No. 343. 



skottets farg." He seems to have considered nothing about E. 

 micrococca. The flexuous habit of frond as well as the brown- 

 ish colour on drying characterize the present species. 



Locality. Hakodate (!), (Kjellman). 



Distribution. Europe; Greenland to Massachusetts; Alaska 

 to Mexico. 



Enteromorpha ramulosa Hook. 



British Flora, II, p. 319— Harv.: Phyc. Brit. PI. 245.— Id. : 

 Manual. Ed. II, p. 215— Kutz. : Spec. p. 479.— Id. : Tab. Phyc. VI, 

 Taf. 33.— J. Ag. : Till Alg. Syst. VI, p. 154, Tab. 4, fig. 117, 118- 

 Hauck : Meeresalgen p. 431.— De Toni : Syll. Alg. I, p. 134 — 

 Collins : Ulvaceae of N. Amer. p. 29, PI. 43, fig. 6.— Id.: Green 

 Algae N. Amer. p. 200. 



= Ulva ramulosa Eng. Bot. PI. 2137.— Crouan : Flor. Finist. p. 131. 

 = Ulva uncinata Mohr. in herb Ag. 

 = Ulva clathrata var. uncinata Ag.: Sp. p. 423.— Le Jolis : List. Alg. 



Cherb. p. 51.— Ardiss.: Phyc. Medit. II, p. 200. 

 — Enteromorpha clathrata var. uncinata Grev. : Alg. Brit. p. 182. 

 = Entcromorpha spinescens Kutz.: Tab. Phyc. VI, Taf. 33, fig. Ill, c. 



General appearance of the plant is excedingl}' variable and 

 often may have a form quite resembling to E. clathrata. In 

 the present species, however, the cells composing the minor 

 branches are markedly smaller than those of the principal 

 segments. 



Locality. Boshu (F. Sugiyama) ; Izu (!). 



Distribution. Europe ; Atlantic coast of N. America ; Aust- 

 ralia. 



Prasiola mexicana Liebm. 



in J. Ag. : Kong. Vet. Akad. Forhandl. 1847, p. 6.— Jessex : 

 Monogr. p. 19, Tab. I, fig. 17-20— Rabenh.: Flor. Europ. Alg. Ill, 

 p. 311.— Lagerst : Monogr. p. 26, fig. 2.— Kutz.: Spec. p. 473.— Id : 

 Tab. Phyc. V, Taf. 40, fig. II.— J. Ag.: Till Alg. System. VI, p. 84.— 

 Wolle : Freshwater Alg. U. S. p. 107, PI. 91, fig. 24,-De Toni : 

 Syll. Alg. I, p. 143.— Coll., Hold, and Setch.: Phyc. Bor.-Amer. 

 No. 1186.— Collins : Green Alg. N. Amer. p. 220. 



