74 



Codiuin iutricatum Okam. n. sp. 



Norn. Japi Motsure-miru. 

 PL. CXX, Fig. 9-13. 



Diagn. : Frond large, creeping, compressed with broader 

 segments, irregularly and divaricately dichotomous, deep-green, 

 intricated by attaching to each other with root-fibres here and 

 there ; utriculi cylindrico-clavate, thin-walled at top, 5-6 times as 

 long as broad ; gametangia elongato-ovate. 



Hab. : On rocks a little below low tide. Ryukyu, Prov. 

 Hiuga (Yendo), Cape Nomo, Futae (Amakusa Isl.), Kashiwa-jima 

 (Prov. Tosa, Shiihara), C. Shiwo (Prov. Kii), Hama-jima (Prov. 

 Shima). 



Dcscrip. : Frond creeping, compressed, irregularly dichotomous 

 divaricately branched, densely intricated by attaching to each other 

 with root-like filaments here and there emitted from the under- 

 surface of segments and forms, in well-grown fronds, a low heap 

 (2-3 cm. high) of irregularly roundish outline covering the sub- 

 stratum extending from 10 to 20 cm. Segments become gradually 

 narrower toward extremities from basal broader portions where 

 they attain 5-10 mm. or more in breadth. Utriculi cylindrical or 

 cylindrico-clavate, obtuse or subtruncate and thin-walled at apex, 

 sometimes a little constricted beneath apex. They measure 

 7 70- 1 1 50 1* in the broadest part, and 5-6 times as long as broad. 

 Gametangia ovate. Colour deep-green. Substance soft to touch, 

 and firmly adheres to paper in drying. 



Affinities: As far as I know, there are three already known 

 species of Codiuin which has creeping habit, viz. C. dimorpltuin 



