April IMS.] YESDO.—XOTES ON ALGJZ NEW TO JAPAN. VIII. 



Ceramium secundatum Lyngb. 



Hydr. Dan., p. 119, Taf. 37, A.— J. Ac: Anal. Alg., Cont. II, p. 

 40— De Tom: Syll: Alg. IV, p. 1480— Kylin: Algenfl. Schwed. W.- 

 Kiiste, p. 187. 



= Ceramium ruhrum f. secundatum Ag. Spec, p. 149.— J. Ac: Spec. 

 Alg. II, [>. 127— Id.: Epicris, p. 100— Petersen : Ceram. Stud., 

 II, p. 115, PI. I, fig. 5 a, PI. Ill fig. 14. 

 = Ceramium ruhrum f. prolifera subf. secundata Fosl.: Norw. 

 Forms of Ceram., p. 15, PI. 3, fig. 5. 



PETERSEN regards the species as to represent a mere form 

 of C. ruhrum clue to the condition of the place where it grows, 

 principally to the shallow water and strong current. I have 

 not reasonable ground to propose anything against his view. 

 Yet as far as C. ruhrum Ag. is defined to have the articuli 

 gradually long towards the lower part of frond, this form can 

 be distinctly separated from it. 



Locality. Shobuta (Dr. A. Yasuda), Takayama (Miss Waix- 

 WRIGHT), Matsu-shima (R. Tsuge, No. 25), Rikuzen Prov.; Nou, 

 Echigo Prov. (Nou Fisheries School, No. 13). 



Distribution. Newfoundland; Iceland; Faeroes ; West coast 

 of Sweden. 



Ceramium rubrum Ag. f. fasciculatum J. Ag. 



Spec. Alg. Ill, p. 100. — Fosme: Norw. Forms of Ceram., p. 15, 

 PI. 3, fig. 3-3.— Petersen: Ceram. Stud., II. p. 116, PI. IV, fig. 23. 



— Bkc.ES.: Mar. Alg. Faeroes, p. 3SS. 

 ? Ceramium involatum Kirrz.: Spec. Alg., p. 686. — Id.: Tab. Phvc, 

 XIII, Taf. 6, fig. I. 



I identity our specimens with the mentioned forma after 

 consulting Petersen's work cited above. The plant is charac- 

 terized by having regularly corymbose-fasciculate branchlets 

 which are terminated with markedly forcipitated apices. In 

 most specimens there is always a small proliferating ramulet at 

 each axil of upper branches. Plate I V, fig. 'S.\ in Petersen's 

 work •-hows this character pretty well. Some specimens, how- 



