142 



are thus growing in a cylinder, and the branching tal^es place in the same plane. 

 The filaments attained only an inconsiderable length; I found them at most 5-celled. 

 As I possess only dried specimens of the plant, I have not been able to determine 

 with certainty the form of the chromalophore; I can only state that it is parietal 

 and probably single. In the spores it appeared to be distinctly belt -shaped 

 (fig. A — D, N). In some cases I believed I saw a pyrenoid (fig. H, P). The end-cells 



Fig. ()7. 



Kijlinia rosiilaUi. A—D, pUinls wilh sporaiifiia. ii, l)asal cell, slill undivideil . bearing a hair. F, plaiil cim- 

 sistiiig (il'a liasal cell giving oil' a one-celled branch which bears a lenninal hair and an androphore-cell with 

 an anthcridiuni. G. plant with anilrophore-cell. 11, I. plants wilh androphore-cell bearing two antheridia. 

 /v. a cell gi\ing off two andropliore-cells. /,. the outer cell in a Iwo-celled lilanient transformed into a car- 

 pogoniiini: two sperniatia Jidhering to tlie trichogyne (compare text). M, the cell given off from the l)asal 

 cell seems to be a carpogonium: the threadlike organ to the right is prol)ably the trichogyne. that to the left 

 an androphore-cell. N, to the right probably a carpogone wilh adhering spermalinm; al the upper side a 

 short lilument with si)orangia. O, the thin cell to the left is probably a young androphore: above possibly a 

 trichogyne. P. the basal cell bears to the right an androphore-cell, above a three-celled complex, i)robably a 

 young cystocarp ; this bears an androphore-cell with two antheridia and a trichogyne. Q, plant bearing above 

 a three-celled, presiniied young cystocarp and to the Icl'l a more developed cystocarp. 



bear frequently a very thin, hyaline hair tapering upwards; such a hair is also 

 sometimes given off from the upper side of the basal cell even before branching. 

 The plants are often much reduced, the basal cell giving off only one or a few 

 short filaments consisting of one or very few cells (fig. E — M, P). 



The sporangia-bearing plants bear usually no other reproductive organs. The 

 sporangia are often terminal on primary filaments, being frequently separated from 



( 



