28 



J Setch. and Gardn. ft / P - g {El > ? $1 * J- Agardh ./ |2 | b 

 Ifc * /" 7 JSl 7- &^ ? #i t 9 Y ffi *>,&*& Fn&m ? 

 A * & * + 9 *. 



CLVH B JR, 1-6 |H- 1 : Odonthalia semicostata (Mert.) J. Ag. ,> Jf * * 8. i- 2 : 

 PtUota asplenioides ; ft (a) * jfe fl y # Hi -3 I ffi & 14. " i *, V, % ft, A.-4 : H 



Nemalion vermiculare Sur. 



Nom. Jap. ! Umi-zomen. 

 PL. CLVIII, Fig. t-16. 



Nemalion vermiculare Sur. Illustr. Alg. du Japon I, p. 91, tab. XXXIV; 

 Hariot Alg. de Yokoska, p. 218, n. 24; De Toni Syll. Alg. IV, p. 78; 

 Id. Phyc. Jap. Nov. p. 19. 



Fronds simple or sparingly branched or splitted, vermicular, 

 very soft and slippery, 10-20 cm. long, 1.5-2 mm. thick, deep 

 vinoso-red fading to yellowish in age. Central strand mostly 

 slender and as thick as X~M ^ ^ ^ en g^ f peripheral filaments 

 whose upper articulations are less moniliform and a little elongated 

 or almost cylindrical. Dioecious. Substance gelatinoso-cartilaginous 

 and the plant closely adheres to paper in drying. 



Hab, : On rocks between tide marks near high tide ; Pacific 

 coast from Kyushyu to Prov. Mutsu ; Otaru, Teshiwo ; between 

 Prov. Idzumo and Prov. Yechigo ; Sado Isl. Sekito (Chosen). 

 Fruits : early summer. 



In external appearence the plant is difficult to distinguish from 

 N. lubricum, but as Suringar stated, the thickness of central strand 

 of the former is much more slender than that of the latter; moreover 

 the upper articulations of peripheral filaments are less moniliform 



