102 THE BOTANICAL MAGAZINE. [Vol. xxix. No. 3-13. 



Kjellman from a material collected at Cape Nomo near Naga- 

 saki. I have, however, already noticed at least two more 

 species of Urospora to occur fairly commonly on our coasts. 

 They were left undetermined as the fructification has not been 

 satisfactorily observed. 



Late in March this year, while staying in the Marine 

 Laboratory at Oshoro, I bad an opportunity of observing both 

 gametes and zoospores in living state on an Urospora which 

 abounds around there. In all and every respect the plant 

 agrees with the mentioned species which is quite common and 

 well known on the Atlantic coast. 



Locality. Otaru Bay and its vicinity (!). 



Distribution. Northern part of the Atlantic Ocean ; North 

 America, Maine to Connecticut (after Collins : List of New 

 Engl. Plants, V.); Alaska to Vancouver Island. 



Spongomorpha arcta Kutz. 



Spec. p. 4-17.— Id.: Tab. Phyc. IV, Tab. 74.— Collins : Green 

 Alg. N. Amer. p. 359.— Id.: Green Alg. N. Amer. Suppl. p. 97. 

 = Cladophora arcta Hakv. Phyc. Brit. PI. 135— Id.: Ner. Bor. 

 Amer. III. p. 75.— Halxk : Meeresalgen, p. 445.— Kutz. : Phyc. 

 Gener. p. 263. — Farlow: Mar. Alg. New Engl. p. 50. — Coll., 

 Hold, and Setch.: Phyc. Bor. -Amer. No. 224, 815.— Tilden : Amer. 

 Alg. No. 373, forma a (non alior)— De Toxr : Syll. Alg. I, p. 355 — 

 Setch. and Gardx. : Alg. N. W. Amer. p. 224.— Collins : Marine 

 Cladophora New Engl. p. 115. — Cotton: Clare Isl. Surv., Mar. Alg. 

 p. 111. 



= Conferva colia?rens Ruprecht : Tange, p. 402. 



= Cladophora cohaerens De Toni : Syll. Alg. I, p. 337, (For further 

 referrences, see De Toni : Syll. Alg. I. p, 355 ) 



Ruprecht 1j has already remarked the close affinity between 

 Conf. cohaerens Rupr. and Conf. arcta Dillw. and concluded 

 that his species " ist vielleicht nur eine Abart der C. arcta. 1 ' 

 The distinction pointed out b}- Ruprecht has little value for a 



1) Tange des Och. Meer. p. 



