g Vol. XLUI, Art. 1.— K. Yendo : 



much deeper places than the site of the glands, they are never 

 in double rings in the stipes of the second -year fronds. The 

 crlands are not remarkably larger than the cells of the epidermal 

 layer and hence less conspicuous when compared with the lacunae 

 of Laminaria. When the sections are stained in fuchsin and anilin 

 blue (aqueous), however, the glands get blue- coloured, while the 

 contents of the other cells become bright crimson red. 



In the complanated part of the stipe, the arrangement of the 

 tissue elements is greatly modified in comparison to the cylindrical 

 part, so as to be adapted for the shape and for the future issue 

 of sporophylls (Plate XVIII, fig. 13). The medulla is much com- 

 planated and stretched transversely, extending almost the whole 

 width. The perimeduUary tissue is here found as a very narrow 

 area bordering around the medulla. The greater part of the thick- 

 ness of the stipe is occupied by the cortex. The cells of the 

 inner cortex are uniform in diameter and nmcli more regular in 

 shape than in the cylindrical part. In either marginal part, 

 only a limited thickness of the cortex is allowed to occupy the 

 narrow space between the epidermal layer and the perimeduUary 

 tissue. The epidermal layer shows no practical difference in both 

 parts. 



A point which requires attention in the structure of the com- 

 planated part of the stipe is that the boundary between the corti- 

 cal portion and the perimeduUary tissue, /. e. the innermost part 

 of the inner cortex, is sharply demarcated by a layer composed of 

 compactly arranged, narrow-lumened, cylindrical cells. These cells 

 may bo taken as a modification of the cortical cells, as they gently 

 pass into the form of the latter. This layer is not noticeable in 

 the cylindrical part but is much more markedly developed in the 

 midrib (Plate XVIII, fig. 15). In this respect, the complanated 



