54 THE BOTANICAL MAGAZTNE. [Voi. xxx. No. mo. 



northern parts, P. kucosticta is usually preclomlnatinc:. Ilcncc 

 the four species may be newly arranged as follows : — 



P. kucosticta Thur. 



f. elongata (Aresch.) 



= P. laciniata var. elongata Akescii. 

 = P. elongata Kylin. 

 = P. tenera Kjelt.m. 

 /; suhorbiculata (Kiki,i,m.) 

 = P. siiborhiculata Kjki.l.m. 



Locality. Very common on nearU' the whole coast except 

 the Kuriles and the Loochoo Islands(!). 



Distribution. Atlantic coast of southern Europe; Aledlter- 

 ranean Sea. 



Gigartina Lessonii J. Ac. 



Spec. IT, p. 20S.— Id.; Epicris, p. 102— Piccone: Alj^lie Viaggio 

 Vettor Pisani, p. 57.— De Toni: Syll. Alg. IV, p. 201. 

 — Sphacrococcus Lessonii Borv: \'oy. Cofpiillc, No. 60. 



Our specimens are all sterile. But it has the structure of 

 Gigartina and accord in general appearance and substfir.cc of 

 frond with the co-tj^pe of Sphaerococcus Lessonii Bory, ktpt in 

 the Agardhian Herbarium at Lund under the mentioned name. 



The plant has certain resemblance with Grateloupia divari- 

 cata Okam., and both may be found in the same localitj'. The 

 latter, however, has much firmer and rigid context generally 

 turning into yellowish cartilaginous substance on drying. A 

 cross section of frond will separate them with greatest safet}'. 



Locality. Nezugaseki, Uzen Prov. (T. Hikida); Iragawn, 

 Uzen Prov. (A. Sato, No. 25). 



Distribution. Chili and Peru. 



Gigartina unalaskensis Kupr. 



in litt. Ikrl). .\cad. Pctropol. — KjEl.LM.: Bcringlinrv. .\lgll. p. 

 31. (noinciij.- De Toni: Syll. Alg. I\", p. 22S (nomcn). 



— MnmiHaria verrucosa var. tina/nskcnsis Krri?. in lilt, Ilorh. 

 Acad. Pctropol. 



