48 Tin: nOTANTf'AJ. MAnAZTXK [Vol. XXX. No. r.-,o. 



tiidinally nrrangcfl. As has been already pointed out l)y Keix- 

 noi.i), the cells of lateral branches attain often to a consider- 

 able len^tli. I have measured a cell llo f> in diameter and 

 3.S mm in length. 



Locality. Shinojima, Mikawa Prov. (S. Nakita, Xo. 21). 



Distril)ution. Mauritius ; Bornec^ Tahiti ; Tonqatabu ; 

 Hawaii. 



Chaetomorpha Linum KiW/.. 



rhyc. Germ. ]\ 204.-1(1. : S]icc. Ali^. p. 378.— Id. : Tal). riiyc. 

 III. Taf. 55. fig. 3.— Haick : Mcercsalgcn, \). 430.— Faki.ow : Xew 

 England Alar. Alg. p. 49.— Dn To.ni : Syll. Alg. I, p. LT.O.— Coi.i.i.xs. 

 HoLDEN and Setcheli. : I'hyc. I'm-.-Amcr. Xo. 22. — Coi-Mns : Alg. 

 Jamaica, p. 243. 



l = Chact. macrotona SuR.: Alg. Japon, \). 20, PI. 0, fig A. 

 ? — Chact. aerca Kutz. f. vcrsata Heydk.: IVitr. /.. Ktiuit. d. 

 Alg. flora V. Ostas. (Ilcdwigia. Bd. 33). 



A Chaetomorpha found associated with Cladophora Stiinp- 

 sonii, collected by Mr. T. Hikida at Kamo, Uzen Prov., 

 agrees in cver\' respect with the species here mentioned. Its 

 occurrence has been hitherto unknown in our country. .•X plant, 

 however, very neary i-elated to it is described by Sitkingar in 

 the work above referred to, from a material collected by 

 Textor in Japan, under C. macrotona Si'r. The description 

 jriven by the establisher of the species is quite brief, mentioning 

 no account to separate it from C. Linum Kiiiz. An actual 

 examination of the specimen, now preserved in the Herbarium 

 of the Botanical Museum at Leyden, could show me no good 

 ground to regard it a valid species. The longitudinrd >triation 

 on the cell-wall as found in the dried specimen can be hardly 

 specific importance. Another plant near to this has been 

 collected by Warburg at Keclung and described by IIi:vi)kich 

 as C. aerca Kittz. f. vcrsata Hevdk. I could not find the 

 s]iecimcn in the Herbarium of the Botanical Museum at 

 Dahlem, P>erlin, where most of his collections arc now pre- 

 served. As far as the description goes^ this forma seems to 

 be referrable to the present species. 



