March, wis.] K. YENDO.— NOTES ON ALGAE NEW TO JAPAN. VI. 89 



can not enter the discussion whether both are to be combined 

 together or the present plant is worthy of claiming an indepen- 

 dent generic position for itself. The genus is characterized by 

 having no fibrous tissue inside the cavity, and our specimens 

 show this peculiarity. It may be here mentioned that in the 

 Agardhian Herbarium at Lund there is no specimen under the 

 generic name of Hooperia. A specimen, however, collected at 

 Fort Hamilton by Hooper and determined as Chylocladia 

 Baileyana by J. Agakdh, is to be found in its species cover as- 

 sociated with Chvlocladia uncinata. 



Locality. Iragawa, Uzen Prov. (A. Sato, Nos. 40, 49, 55) ; 

 Noto Prov. ? 



Distribution. Atlantic coast of North America. 



Laurencia heterocladia Harv. 



in Trans. Irish Acad. Vol. 22, p. 544.— Id. : Phyc. Austr. PI. 

 148.— J. Ao. : Epicris, p. 647.— De Toni : Syll. Alg. IV, p. 782. 

 = Laurencia arbuscula Sond. : Alg. Preiss., p. 30. — J. Ac: Spec. 

 II, p. 709.- Kim. : Tab. Phyc. XV, Taf. 72, fig. a-b. 

 ? = Laurencia excclsa Kutz. : Tab. Phyc. XV, Taf. 63, fig. c-d. 

 ? = Laurencia cymosa major Kutz. : I.e., Taf, 72, fig. c-d. 



Male, female and stichidial plant are found among the Hi- 

 da ka specimens. They fully coincide with the description and the 

 type specimen. IIakyky did not observe anything .about the 

 antheridia. In my specimens they occur at the terminal points 

 of ramuli, three or four aggregating together forming a tuber- 

 culous mass. They belong to the " pinnatifida " type. 1 FALKEN- 

 iu-kc, groups this species among those which have the princip- 

 al stem two-edged. But as Hakyicy defines, I.e., this is not con- 

 stant. Exact cylindrical .stem throughout the entire length "I 

 the plant is frequently met with. 



The illustrations in KuTZING'S Tab. I'livc. X V, Taf. 0.",, fig. 

 e-d and Taf. 71', fig. c-d under L. excelsa and /.. cymosa major 

 respectively appeal' to me to be rcfcrrable to this plant. The 



I i 1 ALKENHEltf) : ltllO<lr ( |iu-lii<:i ell. | >. 'JIT. 



2) Ditt.,: p. 268. 



