ig Hi Mccormick— symphyogyna asp era 415 



7. The young embryo develops by segmentation similar to that 

 formed by a dolabrate apical cell. 



8. The sporogenous tissue is differentiated relatively late in the 

 history of the sporophyte. 



9. The cells which are to form elaters may early be distinguished 

 from the cells which are ultimately to give rise to the spore mother 

 cells. The former cells elongate without further division, while 

 the latter cells undergo several divisions. 



10. The walls of the sporogenous mass of cells become gelati- 

 nized, and the protoplasts are potentially free in the gelatinous 

 substance. 



mother cells attain 



movement vacuoles seem 



imnortant Dart. The examination 



Jungermanniales 



them 



12. Spores with two nuclei have been found, though this is not 



a usual condition. 



JohnM 



J. G. Land 



ivji auvitc cum criucisiii, ciiiu tu jljl. vv . j. vt. .uainjlf, wnu suppucu au 



the material and to whose help and encouragement the completion 



of the paper is due. 



University of Nebraska 



Lincoln, Neb. 



LITERATURE CITED 



Andreas, J 



Flora 86:162-213. 1899. 



2. Bolleter, E., Fegatella conica (L.) Corda. Beitr. Bot. Centralbl. 18: 

 326-408. 1905. 



3- Campbell, D. H., The morphology and systematic position of Calycidaria 

 radiculosa Steph. Stanford Univ. PubL, Dudley Mem. Vol. pp. 43-61. 

 figs. 12. 1913. 



4- , Mosses and ferns. London. 1905. 



5. Cavers, F., On saprophytism and mycorhiza in Flepaticae. 



2: 3o-35- 1903. 



6. , The inter-relationships of Bryophyta. III. Anacrogynous 



Jungermanniales. New Phytol. 9:108-207. 1910. 



New Phytol. 



