— 13 — 



256, PI. VIII. F\i. 4 a-c; De Toni Syll. A\i. Vol. IV. pp. 849 and 548; 

 Okam. On the Veget. Multipl. of C. crass, and its Syst. Posit. (Bot. 

 Mag. Tokyo, Vol. XVII. 1903) p. 1; Id" Alg. Jap. Exsic. (日本海 藻 

 m 品） Fasc. I. no. 23 ; 岡 村， II 本 藻類 名 |E P. 58. 



Hah. ： On rocks between nde-marks or in deeper waters ； verv 

 common along both coasts of the main-island {Honshyu) and the Hok- 

 kaido. 



PL. Ill, Figs. 1-15. Fig. 1 : plant with propagative knobs in nat. 

 state and size. ― ¥\g, 2 : growing: apex of branch, ； p. 力" pericentral 

 cells ； h, h, basal cells of hair-leaves, ― Fig, 3: portion of cross-section of 

 frond, showing the central eel! and 5 pericentral cells, — Fig. 4: 3 

 pericentral cells in cross-section to show belt-like thickening of cell wall ； 

 r, central cell, p. — IMg. 5: one of pericentral cells detached, to show 

 the thickening, ュ"^ • 一 tig. 6: lower portion of frond holding faston a cal- 

 careous alga, /， -^. ― Fig. 7: surface view of a ramellus, 一 Fig. 8 : sur- 

 face view of a ramulus -- ^-. ― Fig. 9 ： longitudinal section of terminal portion 

 of branch, showing the development of a young normal ramulus, 厂， from 

 a basal cell of hair-leaf, / ノ, ― i-'ig. 10: longitudinal section of a branch, 

 showing the development ef 3 young knobs from basal cells of hairs, 

 ma ま d. —— Fig. 11 : longitudinal section of a knob ； beginning of root cells, 

 ま —2. — Fig. 12 : lower portion of knob partly magnified, to show root 

 cells, w, and the accumulation of reserve-starches in cortical celis, ^j^. ― 

 Fig. 13 : portion of longitudinal section of branch, to show the weak 

 and loose connection of propa,^ative knob, k, k •， e, e, epidermal layer 

 of branch bearing the knob, k, k ； b, hair-leaves ； h basal cell of a hair 

 -leaf which has here given origin to the propagative knob, k、 and 

 hair-leaf, b、 magd. 一 Fig. 14 : longitudinal section of branch bearing 2 

 or 3 stichidia! ramuli ； h、 basal cell of a hair-leaf, ュぞ. ― Fig. 15 : portion 

 of a longitudinal section of sticnidial ramulus, showing 2 tetrasporangia, 



220 



