SOME NEW ALGÆ FROM JAPAN. 277 



sections of the same portion through the attachment disc, reveal 

 the cells regularly disposed along the inner surface of the lamina, 

 giving off long fibrous strands downwards along the outer sur- 

 face to form the attachment disc (Fig. 4). 



The present plant was collected by myself in 1903 at 

 Shimushu Island, the most northern islet of the Kurile group. 

 As it had various peculiarities not found in other allied members, 

 I named it Wildemania bulbopes provisionally, and left it for 

 future publication. 



In the Herbarium of the Academy of Science in St. Peters- 

 burg, I found similar specimens collected at Behring Island, 

 Kamtschatka, in 1847. They were determined by Ruprecht as 

 "Porphyra umbilicalis var. vulgaris Ag. a". The form is men- 

 tioned in his Tangè des Ochotischen Meeres, p. 394, but with 

 only a short description. He seems not to have noticed the cha- 

 racteristic inflation at the base, or at least to have attached little 

 importance to it; but the peculiarity is so remarkable, that 

 when we put the fresh specimens in water for mounting, all the 

 fronds hang down in the water with the inflated base floating 

 on the surface. 



What Ruprecht has mentioned in the same work as 

 var. vulgaris Ag. b, collected at Yavina, belongs to an entirely 

 different type, and more or less resembles Porphyra perforata 

 J. Ag. in its external appearance. He placed various other forms 

 of Porphyra and Wildemania from the North Pacific under 

 the single species of Porphyra umbilicalis Ag. J. Agardh 1 

 referred this conglomerate "species" to his Porphyra perforata, 

 the result being much confusion in its specific limitation. 



1 While the present paper was in the press, the author was studying 

 in the Agardh Herbarium in the Botanical Museum at Lund. There 

 he found Kamtschatkan specimens of Porphyra bulbopes (specimens 

 Nos. 13041 and 13042), sent by Ruprecht as P. umbilicalis var., but 

 determined by J. Agardh as P. perforata J. Ag. 



