92 



the cyslocarpia are "clustered near the basal disc", and according lo Kuckuck (I.e.) 

 the filaments are narrower (4,5 — 7 fj.) in Batters' species than in Ch. rhipidandra. 



To the description given above the following remarks may be added. The 

 basal cell is fastened to the surface of the host plant by a very distinct disc con- 

 sisting of a cementing substance staining intensely blue in Mayer's hsemalum. 

 The sporangia are usually alternate or more or less regularlj' secund (fig. 19 on 

 the left), seriate, as the plant generally has a tendency to unilateral ramification. 

 When each cell bears two sporangia, they are usually, but not always, opposite, 

 and several pairs of sporangia are then often superposed (fig. 19 to the right). 



When the sporangium is placed on a unicellular 

 branchlet, this often bears also a hair; the hair 

 being terminal, the sporangium is then lateral on 

 the branchlet (fig. 19). 



The antheridia are placed in characteristic, flat, 

 usually triangular clusters consisting of 2- to 5-celled 

 branchlets branched only on the upper side; they 

 are produced in a number of one to three on all 

 the terminal cells of the cluster, and also singly by 

 some of the othei- cells (fig. 20 A, B). 



The carpogonia are sessile on the upper part 

 of the main filaments or on the lower part of the 

 branches; they are bottle-shaped, with a trichogyne 

 of about the same length as the ventral part (fig. 20 

 D, c). After fertilization the carpogonium grows out 

 in a three-celled filament which still bears the tri- 

 chogyne or a remnant of it on the second cell (fig. 

 20 E, H, t). A branch is now given off from the 

 lowest cell, the primary filament is further divided 

 so that it becomes 4- or 5-celled, and it gives ofl" 

 more branches from the lower cells, hi fig. 20 F, 

 the primary filament is seen to be 5-celled; the 

 uppermost cell produces a carpospore, the others, 

 with exception of the subterminal cell, each bear two branches which are either 

 unicellular and produce directly a carpospore or become 2- or 3-celled and produce 

 a carpospore in the end-cell. The ripe cystocarpium is of somewhat irregular, 

 nearly globular shape; its peripheral cells are swollen and each produce a carpo- 

 spore (fig. 20 D). 



This species has only been found at F'rederikshavn, where it was collected in 

 August 1891 growing on Porphyra umbilicalis on the outer and the inner side of the 

 moles. It grew on the flat side of the fronds, in some cases so abundantly that 

 the frond of Porphyra had become dull and purplish. 



Locality. Kll : Frederilisliavn. 



Fig. 19. 



C.huDtraniia rliipiilandia. Two spore 

 lioarinn plants. :!()0 : ]. 



