THE BOTANICAL MAGAZINE. 



secund on the outer side of a thicker, curved branch. In this 

 respect our plant approaches more to CI. Thwaitesii, though 

 in some parts of frond may also be found pectin atel^^ secund 

 ramulets. Kutzing's species, however, is from fresh water and 

 has been reduced to a form of CI. glomerata KuTZ. To refer our 

 plant to a fresh water form known from southern Germany 

 shall be hardly preferrable. 



So far as I could refer to, our plant seems to be mentioned 

 under CL utriculosa Kutz., provided that CI. Thwaitessi Hary, 

 may be included within its specific limitation. 



CI. arbuscula Kjellm., described from a material collected 

 in Japan is very likely referrable to this species. The original 

 specimens, now kept in the Herbarium of the Botanical 

 Museum, Upsala, seem to be less ramulose form of the same 

 plant here treated, and the figures illustrated in Kjellman's 

 Marina Chlroph. fran Japan Taf. 5. fig. 7, 8 represent the ex- 

 treme type among his collection. 



Locality. Wakasa Prov. (R. Tsuge) : Tajima Prov. (Herb. 

 Imper. Mus. No. 29) : Echigo Prov. (!) : Shima Prov. (Herb. 

 Imper. Mus. No. 67) ; Enoshima (F. Hirayama, No. 156) : 

 Same Harbour (N. Takahashi) : ? Nagasaki (Kjellman). 



Distribution. Hitherto known from Europe and the West 

 Indies. 



Gomontia polyrhiza Born, et Flah. 



Journ. de Botaniqtie, Tome II, p. 161-Coli.ins ; Green Alg. 

 North Amer. p. 371. 



This boring alga, widely distributed in Europe and Ame- 

 rica, has hitherto been overlooked in Japan. I brought some 

 of the Japanese material with me to Prof. N. Wille in Christ- 

 iania and by his kind help, I was able to identify my speci- 

 mens to the present species. 



This species is known in Japan to occur in the shells of 

 pearl-oysters, barnacles and Area species. It seems to occur 

 always associated with Hyella or Tellamia, species of which is 

 not yet fully determined. When found in Area shells, however. 



