- i 5 6 - 



tough and the plant firmly adheres to paper in drying ; the frond 

 strongly contracts taking a channelled appearence when dried. 



Hab. : On rocks near low tide extending to deep tide. Kago- 

 shima, Nagasaki, Hirado, Cape Nomo, Prov. Tosa and lyo, Eno- 

 shima (Sagami), Prov. Boshyu. 



The specimen by which Holmes founded the present species 

 is probably a young form and he measured the length of utriculi 

 as only 3 times as long as broad. He took it as one of the 

 characteristics distinguishing C. divaricatum from C. clongatniiit 

 but it is not so short as he mentioned. 



The present plant has a very close resemblance with Carftiun 

 elongatnm Ag. in the external appearence. To me the difference 

 between the two related plants seems to exist in the form of utri- 

 culi and their apical thickness. Utriculi of the present alga is cylin" 

 drical with subtruncate apex whose wall is more or less thickened 

 and especially in older specimen or in older portion of a frond. 

 The apical wall is much thickened as shown in PL. CXXXYI, fig. 

 3 ; while in C. elongation they are obovato-clavate with round and 

 thin-walled apices. I have not been able to ascertain the size 

 of a fully grown frond of that species in the literature consulted, 

 but in our plant it attanis 90-100 cm. in length. 



C. clongatum Ag. has been reported to occur in this country 

 by early authors, such as Suringar, Kjellman etc. Amongst others 

 Kjellman reports this alga to have obtained at Cape Nomo giving 

 an illustration of an utriculus (Marina Chlorophy. fran Jap. p. 35, 

 Tab. 7, f. 4-5). In my specimen get from the same locality 

 I find some of utriculi to be obovato-clavate somewhat resem- 

 bling those of C. clongatnm, but in the same frond cylindrical and 



