246 'J'^f'l- HOTAyrCAL MAaAZrXK I Vol. XXX. No. 355. 



Acrosiphoiiia Mertensii (Ri tkeciit). 



=Coiifcr\'a Afcrtcnsii Rni'K.: Trint^o dcs ocli. Mccrcs, \^. 103. 



= Chulophorn Afcrtcnsii Dk Toni : Syll. .Ml;. I, j). '!17. 

 ?-Confcrv;t viniitu-n l\i"ru.: Tanj^jc des ooli. Mccrcs, p. tO''. 

 ?=Cla(1opl]orn vimiiicn Di-: T(».\'i: S\ II. .Mij;. I, p. 'lis. 



M}' specimens are ri1)()ul U.f) em in iKi^liI, with cacspitosc 

 rrniids starting; from densely inlerwoveii root. The tyj)e speeimen 

 of Con/] Alcrtetisii Rri'i-:. in St. rctei>l)m\<.;' is lar_<.;'er than mine, 

 measuring" al)()UL 11 em in hcijj^ht and growini^ on iVond of 

 Fucus evancsccncs. In mode ot ramification and in other 

 chai-actcrs, the plant resembles very mneli to the next species. 

 r>nt the fdaments are much finer in the ])resent species, mcasnr- 

 in<; bnl 110// or little more in diameter in the nppcr cells; and 

 the cells in tlie upper parts of frond are once to twice as lonii," 

 as the diameter, only occasionally being as half short. 



'1 he type cpecimens of Conf. Mertensii and Conf. viniinca 

 appear to me hardly separal)le one from the other. The only 

 distinction between them, in the description given by Rupkkcht, 

 lies in the length of terminal cells, in the former measuring 

 22v5 /i and in the latter, 375-750 fi. 



Lccality. h^torofu Island (!j; Kitami I'rov. (K. Kavama). - 



Distribution. Sitka; Kamtschatca. 



Acrosiphonia diiriuscula (Rn'RFciiT). 



= Confer\;i iliiritisciil;i Rm'K.: Taii^c dcs ocli. Mccrcs, p. Idl-. 



= Spongomorpha rJiiriiisciiLi Coi.i.ixs: Green Aljj^. N. Anicr.. p. .''.57. 



-Chactomorphn? (luviascula I'l-; I'oni: Syll. .Ml;. 1. ]). 'J77. 



= Clnclophora alnskana Com.i.ns: in Sktcii. and (i.vku.n.: \h^. N. 



\V. .'\nicr.. ]). 22S.— Id.: in IMiyc. lior.-Amcr., No. '.»17. 

 = CInih>/>li(>r;i ilittusn Kjiii.LM. /*./>. I>crinL;hafv., p. 5.5. 

 =Confcr\\'i cartihiffiiici Rri-w.: T.anoc dcs ocli. Mccrcs, p. l-O-i. 



1 he present pUmt is at once distinguished from the others by 

 having s])aring, upright branches, short cells, and thick and rigid 

 membrane. Owing to the last mentioned character the cni])tied 

 sporangia kee|) their shape with silky bi-.trc after dri».-d for 



