GENERAL REMARKS. 365 



6, / Ovula. not certain whether the terminal cell is solitary 



or double, as 6 would seem to point out. 

 8, 9. Farther stages of advancement of the ovuliform seta. 



10. Pistillum, shewing spacelation of style and its evident 

 canal, 8 belongs to this. 



1 1, 12. Apex of styles. 



18. Pistillum further advanced, 9 is its seta. 



14. Ditto calyptra torn from its base. 



15. Its seta and young theca detached. 



On the different facts represented in these sketches. I have 

 but little additional to add. The nature of the pistil, parti- 

 cularly when examined in its earlier stages, and the subse- 

 quent changes it undergoes, have all marked analogies with 

 the changes in the pistilla of Phanerogams, consequent on im- 

 pregnation. The stigma is most marked both in form and the 

 dense sphacelation it undergoes, to say nothing of a disloca- 

 tion occasionally of its proper cells which are generally, I 

 think 5. 



The changes in the male mosses, for they are generally dioi- 

 cous, are contemporaneous, that is, so far as the yellow bodies 

 or anthers are concerned, and these will among a group of in- 

 dividuals having the female already in developement, be found 

 always to present the appearance of functa officina. The first 

 change in the pistillum consists in an enlargement, and a 

 bulging out of its upper third : and in this soon becomes visi- 

 ble a cell, which is the cell afterwards found on the apex of 

 the seta, this cell may pre-exist, but I am not sure whether it 

 does or not ; the growth is now rapid, consisting chiefly of that 

 of the tail of the seta, but the limits of this organ are soon 

 fixed and its conical point marks the site of the future oper- 

 culum. 



It continues to enlarge the apex being so to say pushed 

 downwards, until it penetrates the apex of the axis, its elong- 

 ation in this direction is terminated by the induration of the. 

 older parts of the apex of the axis, and .the consequence is, 

 the tearing up of the calyptra from its base, and the seta 



