8 AKT. .i,~K. YENDO: 



disc, by which it attaclies! to a pebble or a rociv as sliowii in the 

 photograph (fig. 2). Tliis i.s remarkal)le in tlie case of /". rosaril'onnis. 



A dwarfed form, found in the southern limit of the cold current, 

 is very similai- in its appearance to the well grown forms of Ampliroa 

 rigida, from which, however, can be distinguished bv liaving the 

 large conceptacles and the rosy purple tint. 



This plant is one of tlie flora of the cold Siberian current. The 

 ruri-ent washes the whole coast of Hokkaido (Yesso) and runs south- 

 ward as fai" as Ivinkwa-san Island in the ])rov. of Rikuzen. So also 

 the plant is distributed. It is generally found deeper than 2 feet 

 below the low tide mark, usually where a few other plants grow. 

 Prov. Rikuzen : Hakodate : Otaru : Rishiri Island. /". rosarifornus is 

 hitherto known only from Kîiifu, a rocky coast in the western side of 

 the main island (Honshu). 



4. Amphiroa ephedraea, (Lamk.) Aresch. 



IM. I. fig. 7-10: n. IV. fig. 5-8. 



Fronde elata regulariter dichotoma, flabellata, sursum attenuato- 

 tereti vel compresso-subdilatata ; ramis ramulis([ue patentibus ; 

 articulis inferioribus brevioribus, superioribus diametro oplo — 5plo 

 longioribus ; geniculis inferioribus diametrum subi\3(|uantibus, superi- 

 oribus brevioribus ; conceptaculis numerosis. 



I'i. fronde inferne tereti vel subtereti, superne sensim compressa 

 vel subcomplanata. 



Corallinjj ephedriea, Lamk. Mem. Mus. II. p. :^o8. 

 Amphinja ephednca, Aresch. b. in J. Ag. Spec. Alg. II. p. 



534. 

 A. ( Jaillonii, Lamx. Rolyp. Coral. ]>. ^^98. t XL o. 



