io6 



Elementary Biology. 



FIG. 37. Funaria J:ygrometvica. 



(Sachs.) 

 VI 



in form, being more club-shaped and with a narrower stalk. 

 They carry chlorophyll grains and resemble in other respects 

 ordinary epidermal hairs, or the paraphyses of Fucus, with 

 which they are homologous. 



The female sexual organ or 

 ovarium consists of a swollen basal 

 portion, commonly called the 

 venter, and a long terminal tube B 

 or neck (fig. 37). Both venter 

 and neck are made of cells, two 

 layers thick in the venter, and one 

 layer thick in the neck. The 

 venter when mature contains one 

 large central cell, the ovum, whilst 

 the canal in the neck is filled by 



FlG. 36. DIAGRAMMATIC REPRESENTATION OF 

 THEHOMOLOGIESOF THE FEMALE REPRODUC- 

 TIVE ORGANS OF Fucus AND Polytriclimn. 



A, apex of stem of a female thallus 

 ( x 100) ; a, female reproductive 

 organs ; b, leaves, u, female 

 reproductive organ ; b, venter 

 with ovum ; //, neck with seven 

 canal cells. 



the mucilaginous remains of half-a-dozen long narrow cells, 

 whose duty it is before fertilisation to swell and force open 



