260 



which is not surrounded by peculiarly shaped cell-rows. The sporangia are four- 

 parted; I found them 70/^ long, 24 — 35 u broad, thus somewhat smaller than indi- 

 cated by FosLiE. However, I have only met with a small number of well devel- 

 oped sporangia; I am therefore also unable to state whether they are placed over 

 the whole conceptacle or only in its periphery. A group of sterile filaments in the 

 middle of the floor was not observed. The emptied conceptacles are limited by a 

 sharp inner contour. 



Supposed antheridial conceptacles are shown in fig. 182. They had a transverse 

 diameter of 60 — 77 fj. and the slightly prominent pore surrounded by a number of 



Fig. 181. 



Lilhophylluin orhiciilatum- A, vertical section of tetrasporic conceptacle sliowing tlie pore. B, similar, but somewhat 

 excentric section. C and D, feebly developed, not yet fully divided sporangia 350 : 1. 



peculiarly formed narrow, obliquely upwardly directed filaments, forming the cen- 

 tral part of the roof. The rather plain floor was in some cases covered by a very 

 small-celled layer which had probably supported the spermatangia. hi some of 

 these conceptacles small bodies were seen which were supposed to be spermatia. 



The conceptacles of cystocarps are entirely immersed (fig. 183); they have an 

 inner diameter of 112 — 142/^. (According to Foslie it is 200— 300 «, but it is not 

 stated if it is the inner or the outer diameter). The pore is surrounded above by 

 obliquely upward directed filaments resembling those of the antheridial conceptacles; 

 but below them is situated an inner crown composed of obliquely downward di- 

 rected cells. Fig. 183 A shows a number of carpogonia in the central part of the 

 floor, those situated nearest the centre having the longest trichogynes. The carpo- 

 spores are produced from the margin of the disc-cell at the base of the conceptacle 

 (fig. 183 B). The inner crown of the peristome keeps for a long time in the over- 

 grown conceptacles. 



According to Foslie (Remarks p. 113) "the conceptacles do not become gra- 



