July, loifi.] YJiNDO.—NOTJiS ON ALGJF: NEW TO JAPAN, V. 240 



Spongomorpha siixatilis LOr.uxs. 



Green AI-.'K- of N. Anicr., p. 860.-1(1.: Phyc. Bor.-Amcr., No. 921. 

 =Confcrva saxatilis Rupk.: Tange des Och. Alccr., p. 403. 

 = Confcr\n Chamissonis Rupr., 1. c, p. 403. 



= Claclophoi'a Chamissonis Harv. : Ncr. Bor. Amcr., Ill, p. 75. 

 = Spongomorpha saxaiiUs var. Chamissonis Collins: 1. c, p. 360. 



Til general nppearance of frond this s])ccies resembles very 

 mueli with Sporty, arcia. It is, ho\vever, easih' separated from 

 tlie latter by having the basal part of frond mtieh slenderer 

 t hail the ii])])er. 



CoLT.iNs'' notes that C. Mertensii and C. virninina may re- 

 present intermediate forms between C. saxatilis and C. Chamis- 

 sonis. The type spceimens in St. Petersburg show that the 

 former two are without doubt mere forms of one and the same 

 speeies, but the}- prove at the same time that they are quite 

 distinct from the latter two. 



The generic position of the present speeies is rather doiditful 

 to me. According to Wille's view% recently published in Pflan- 

 zenfamilien, Nachtrag, p. 11 G, it seems better to be placed under 

 Cladophora. 



Locality. Oshoro (!). 



Distribution. Knmtehatea; Alaska to Was-hington. 



Spongomorpha arcta Kutz. 



Pliyo. Germ., p. 263.— Id.: vSpec. Alg., p. 47.-1(1.: T.il). Pliye. 

 IV, Taf. 74, n-^. II.— FosT.n:: Mar. Alo-. Norway, p. 130.— Dk Toni : 

 Syll. Alg. I, p. ;535.— Collins: Green Alg. N. Anier., p. 359. 



Forma Hystevix FosL. is also represented within our boun- 

 dary. 



Locality. Kurile Islands (!); Kushiro (Dr. T. Kawakami). 



Distribution. North-west coast of Europe; Greenland to New 

 Jersey; Alaska to Washington. ^ 



1) Green Alg. of N. Amer., p. 3G0. 



