9° 



MOSSES AND FERNS 



CHAP. IV 



apical cell such as obtains in Aneura, but it seems probable 

 that such a relation does exist. After the archegonium mother 

 cell is cut off, it does not at once divide by vertical walls, but 

 there is first cut off a pedicel, after which the upper cell under- 



FlG. 38. — A, Pallaviciiiia cyluidrica (Aust.), X4; per, the elongated perianth; B, Anem-a 

 J>innati/ida iX,.), x6; ?, archegonial branches; C-E, Fossoiiibronia longiseta (Aust.), X4 ; F, 

 Blasiapusilla {}-■•), X4- 



goes the usual divisions. Of the three peripheral cells one is 

 much smaller and does not as a rule divide longitudinally, so 

 that the neck has normally but five rows of cells instead of six, as 

 in the Marchantiaceae. Owing to the formation of the pedicel, 



