95 



are placed singly or in small groups of Iwo or three at Ihe end ol' shorter branches; 

 they are round, 3 // long, 2,5 u broad. The carpogonia are situated on similar, 

 rather short, usually 1- to 5-celled, branches as those bearing the antheridia, and 

 they are often placed in the immediate vicinity of the antheridia (figs. 21 E, 22 B). 

 I have not succeeded in follow- 

 ing the development of the cy- 

 stocarpia , especially the first 

 stages. It seems that the tri- 

 chogyne disappears very soon 

 after fertilization. In fig. 21 E 

 is shown a carpogonium imme- 

 diately before fertilization, in fig. 

 23 another with adhering sper- 

 matia, and in fig. 22 A and C 

 abortive carpogonia are shown, 

 but I have never seen a tricho- 

 gyne on a carpogonium after 

 the commencement of the divi- 

 sions; it might perhaps have 

 been on the place marked with * 

 in fig. 22 D; the two spores situ- 

 ated on each side of this must 

 then be carpospores and the 

 whole cell-complex a cystocar- 

 pium. A very similar case is 

 shown in fig. 23 B, and the plant 

 shown in fig. 21 C bears undoub- 

 tedly also two or three cysto- 

 carps. The cystocarps are thus 

 corymbiform and produce only 

 a very small number of carpo- 

 spores. Usually only two carpo- 

 spores are present at the same 

 time, but it is probable that 

 others may develop after the 

 first have been exhausted. The 

 carpospores are somewhat larger 

 than the sporangia, viz. 14 — 18 ij. long, 7 — 9 ^ broad. 



At some places, mostly in the northern Kattegat, specimens were met with 

 which agreed in all essentials with those described above but differed in having 

 shorter cells, about twice (IV2 — 3 times) as long as broad. The cells being, as in 

 the main form, often a little enlarged at the upper end, they may differ somewhat 



Fig. 22. 



Clmnlransia liallandiea a. tijpica. A. fragment of plant with abortive 

 cari)oj;(inia and sporangia. B, l)ranchlet witli antheridia and carpo- 

 gonium. C. plant with abortive carpogonia and probably unripe cy- 

 stocarps. D. cystocarp, at * perhaps Ihe jjlacc of the trichogyne. .5.50:1. 

 All plants from AH'. 



