27. 

 sule lir:s -.vil.h its vontral sido nearly in contact "'itli 

 tliat of the lov/or or ntalk portion of tho r.porocarp [Fif-, 

 43). Tliere is never cuiy curling; in^tlie extreme tip of 

 tlie sporocarp siiggoGting the circinate coiling of the 

 leaf, and the bending mentioned is later partially straiglit- 

 ened out, as Rnssovj ('72) has shov/n by the more rapid 

 grovrth of the ventral side of the capsule. Tlie activity 

 of the apical cell as such, is ended by tlie appearance 

 in it of a v;all, v/hich in a h.orizontal, section is ap- 

 parently a periclinal, but its exact direction v:as not 

 made out satisfactorily in sagittal sections. At thf} i ime 

 v/hen this wall appears the bending maitioned above has 

 taken place, the capsule is a millimeter long,, and the 

 sori at the base of this are developed as far as that shovrn 

 in Fig. ."O. 



Tlie first few pairs of segments of the sporocarp, 

 proDaoly four or five, form the sterile stalk, trnd. the rsot 

 develope the fertile tip o"^- capsule. Of thu segments of 

 the capside the first tliree pairs do not develope sori end 

 only the youngest one forms a lateral bundle. Eaeli seg- 

 ment of the next eight or nine pairs given rise to a sin^jlo 

 sorus tmd to a lateral bra.nch of the dorsal bundle of the 

 capsule. Beyond the last of the soral segments are six 

 or seven pairs, of which only the tliree or foiii' oldest 

 form lateral bundles and none fo rm sori. Tlic capsule 



