F. Borgesen: Rhodophyceæ of the Danish W. Indies. 



403 



seen from above, polygonal (Fig. 388 B), in transverse section 

 roundish-oblong. 



Towards the cavity in the interior of the vesicles the large 

 cells (about a third part of them) bear here and there gland-cells, 

 which are rather regularly distributed (Fig. 388 B). They are 

 nearly always solitary, a single one in the middle of each 

 cell; a few times 1 have found two, but distinct glands, upon 

 the same cell. The glands are nearly spherical. According to 

 Kuckuck the glands do not occur in the Mediterranean plants 

 or are at any rate very 

 rare. 



In a specimen from 

 Ajaccio, Corsica, which I 

 gathered there in Novem- 

 ber 1897, I found glands 

 rather abundantly ; they 

 were larger than those of 

 the West Indian form, of 

 oval to oblong shape, and 

 occurred singly, but mostly 

 quite near the cross-walls 

 of the large cells. 



Transverse sections and 

 longitudinal sections of the 

 massive stem of the West 

 Indian plant seem quite to agree with Kuckuck's description. 



The above mentioned differences, regarding not only the ex- 

 ternal appearance of both plants but also their anatomy, show that 

 the American plant does not exactly agree with the Mediterranean. 1 

 propose to call the American plant var. occidentalism the differences 

 between them not being of such importance that a specific dis- 

 tinction seems necessary. 



All my material was sterile, but Kuckuck gives fine ill- 

 ustrations of a part of a tetrasporic plant and of a transverse sec- 

 tion of a cystocarp. 



At the islands the plant was found in deep water only, at 

 a depth of about 12 — 15 fathoms, while in the Mediterranean sea 

 it is also found in shallow water. 



Fig. 388. Chrysymenia Uvaria (L.) J. Ag. 

 A, transverse section of the wall, the upper- 

 most of the large cells facing the cavity 

 with a gland (70:1); B, large cells, facing 

 the cavity, some of these with glands 

 (70:1); C, part of the cortical layer seen 

 from above (150:1). 



26=* 



