248 TJU: BOTANICAL MAGAZINE. [Voi. xxx. No. S55. 



choose to nicnli(ui llic ]M-escn1 jilanl inidcr that preniis. Among 

 the s])eeies ol Acrosiphonia rleseril)ed hv Kjeli.man, Ac. setacea 

 K|i:i.i.M. stands nearest to our plant. 



LoeaHty. Kui-ilc Ishmds (!). 



Distribution. Berino^ Islands; St. Paul Island; .\laska. 



Cladophora glaiicescens ITakv. 



I'liyc. Brit.. IM. 190. — Dh To.ni : Syll. Alo. I. j). 320. — FosLu: : 

 Mar. Alg. Norway, p. 136. — Collins: in Pliyc. Bor.-Anicr., No. 817. 

 — Id.: Mar. Clad. Now Knolaiid, p. 120. PI. 36, fig. 6.-1(1.: Green 

 A1-. N. Amer., j). 336. 



In liie Herbarium of the Trinity Colletje. Dublin, there is a 

 speeimen of Cladophora, eollceted by C. Wright in japan and 

 named CI. glauccscens var. japonica by IIarvev. The variet\' 

 has not been ever ])ublished by Harvey, nor the ( ccurrenee of 

 CI. glauccscens IIarv. on our coast has hitherto been reported. 

 The specimen in the rierl)arium is about 5 cm in height, pale 

 .i^reenish straw colour with earthy lustre. The cells ot princijial 

 filaments measure 4<0-4r) i' in diameter and 200-300 n in 

 length ; those of the ultimate ramulets, 80-40 /'. in diameter 

 and 100—200// in length. Ultimate ramulets in upper po.tion 

 of the frond are mostly secund. 



Another specimen collected at " Ilahodadi Ray, on rocks 

 above low tide" by the same collector is kept with the said 

 specimen. It is a tiny plant hardly exceeding 12mrn in height, 

 caespitose, in outward appearance recalling CI. iincinata. i'lie 

 measurements of cells are exactly as in the (tlur. r)()ih have 

 the rhizoidal filaments formed by prolcngation of lower cells 

 whieli traverse d(nvn\vards through cell-rooms of the subor- 

 dinate cells. 



Examining the material in my hand, I found several speci- 

 mens which represent th? two forms. It was rdso ascertained 

 that we have much larger foi-m than \vhat IIarvev called var. 

 japonica, attaining 20 cm or more in the total height, and 

 kee])ing all the characters observed in the smaller forms. After 

 carclul comparison with luiiopcan s]iecimens o[' CI. glauccscens 



