THE (ilJEAT flKOUPS OK r.in'iM'IIY'l'ES 



010 



The air chambers are outlined 011 the surface as small 



rhombic areas (nreolw), each containing a single air pore. 



Peculiar reproductive bodies are also developed ujion 



the dorsal surface of Mnrclumtia for vegetative multipliea- 



Fk;. S87'. Marchantia pohjmorpha: I, partial section throncjh archegoiiial disk, phow- 

 \\\^ archt'gonia with long necks, ant] venters containing eggs; 9, young archego- 

 niiim showing axial row; W, superficial view at later stage; 11, mature archego- 

 niiim, with axial row disorganized and leaving an open ])assage to the large egg; 

 13, cross-section of venter; 13, cross-section of neck.— After Kny. 



tion. Little cups (cnpnles) appear, and in them are numer- 

 ous short-stalked bodies (f/emiixp), which are round and 

 flat (biscuit-shaped) and many-celled (Figs. SSI, 385). The 



