4 o8 BOTANICAL GAZETTE [novembek 



Fig. 13. — A completely involved linear row of the thallus with outer portion 

 showing resorption of cross-walls and loss of nuclear detail. 



Fig. 14. — Two initial rows which are modified young hairs. 



Fig. 1 5. — An initial row including a linear row of the thallus together with a 

 terminal hair; entire structure shows more or less disintegration and loss of 

 cross-walls. 



Fig. 16.— A stage which begins to show characteristic "filiform appendage" 

 at basal end of initial row; almost all the cross- walls have been resorbed and 

 original cell contents have disintegrated into granular patches. 



Figs. 17, 18.— Showing how interior cells of thallus pull away and release 

 the "filiform appendage" from pressure. ' 



Fig. 19.— A young conceptacle with young septate hairs. 



Fig. 20.— A later stage of a conceptacle with development of septate hairs. 



Fig. 21. — The hair pit stage of the conceptacle. 



Fig. 22. — A mature conceptacle, showing various stages of reproductive 

 sacs (gametangia ?) and a few fragile hairs; old hairs have been shed. 



Fig. 23.— The initial row as it appears in a conceptacle at stage shown in 

 fig. 22. 



Fig. 24.— Gametangium (?) just before discharge of contents. 



