SOME TYPES OP PLOWEKLESS PLANTS. 



237 



urns, exajnine'with the magnifying glass, and sketch it. Note the char- 

 acter of the material of which its outer layer is composed. 



Fig. 203. 

 A, longitudinal section of summit 

 of a small archegonium-bearing 

 plant of Funaria hyrometrica, a 

 moss ; a, archegonia ; b, leaves. 

 £, an archegonlum of tlie same 

 moss ; m, mouth ; h, neck ; 6, 

 enlarged portion, containing 

 the oosphere. {A magnifled 100 

 diameters ; B magnified 650 

 diameters.) 



Fig. 204. 



A, a bursting antberidium 

 otFwnaria kygrometrica, 

 a moss ; a, the antbero- 

 zoids ; B, tbe antbero- 



-zoids more strongly 

 magnified, in tbe mother 

 cell ; c', antherozoid of 

 pigeon-wheat moss (Poly- 

 trichum). (All much 

 magnified.) 



Sketch the uncovered urn, as seen through the magnifying glass, 

 noting the little knob at its base and the circular lid. 



