July, U*15J YESIXJ.—MjTES US Al&M NSW TO JAPAN. I If. \\\ 



laciniata. So far as I could refer to, the propagating organ 

 has not called for any further discussion. The present determi- 

 nation is hence provisional, principally based on the habit and 

 the structure of the frond. 



Locality. Sagami Prov. (!), (T. Sato), (Y. Funahashi). 



Distribution. Australia. 



Plocamium Telfairiae Harv. 



in Kutz.: Spec. p. 885.— J. Ac: Spec. II, p. 40 J.— Id.: Epicris, 

 p. 342. 

 =P. brachiocarpum J. Ac (non Kutz.) Spec. II, p. 404.— Id. : Epicris. 



p. 341. 

 = P. abnorme H. et H. : Alg. Nov. Zeland. p. 543.— J. Ao. : Spec. Alg. 



II, p. 401.— Id.: Epicris, p. 343.— Harv.: Ner. Austr. PI. XLIII.— 

 Kutz. Tab. Phyc. XVI, Taf. 50, fig. d-e.— Okam.: Icon. Jap. Alg. 



III, PI. CI, PI. CII, fig. 1, 2. 



=P. angustum Harv.: Austr. Alg. No. 357D (non alior). 



= P. rccurvatum Okam.: Icon. Jap. Alg. Ill, PI. CII, fig. 3, 4. 

 ?=P. nobilej. Ac: Spec. II, p. 397.— Id. : Epicris, p. 341 (excl. syn.J. 

 — Cotton : Mar. Alg. from Corea (Bull. Kew Gardens. Misc. in- 

 form. 1906). 



— Thamnophora Telfairiae Harv.: Alg. Telfairiae, No. 8. — Hooker: 

 Journ. of Bot. 1, p. 147. PI. 125. 



The present species belongs to one of the most variable 

 member of the genus. Mere forms of it, due to the age of the 

 plant or to the condition of habitat, seem to have been de- 

 scribed in the specific ranks. After a careful study on the 

 numerous specimens collected at various seasons and at various 

 parts of our coasts, and comparing them with the authentic or 

 the original specimens in the herbaria in Europe, the syno- 

 nymes above enlisted, except the last mentioned, arc newly 

 here proposed. All the gradations to link these "species" may 

 be met with in our material. 



The variation of forms of the plant is mainly due to the 

 breadth of segments, the length of intcrnodes and the degree of 

 development of the indefinite branches (pinna secundaria in J. 

 Agardh's sense). These characters are highly variable even in an 



