364 



MUSCI. 



The other parallels however ingenious, are constructed on 

 the supposition of the theca being analogous to a flower bud, 

 whereas it is the fruit, and analogous altogether to the fruit 

 of Phaenogams, notwithstanding that its first developement is 

 that of a Phaenogamous ovule. 



The formation of the parts of a theca are at variance with 

 the hypothesis : the teeth of the Peristome are formed by a 

 separation of certain portions of the apex of the columella, if 

 they were leaves they must be developed from below upwards. 



Plate CVIII. Fig. I. 



Illustrations of Phascnm. and the Developement of Theca. 



1. Phascum species of, smaller variety. 



2. Ditto larger variety. 



3. A leaf. 



4. 5. Calyptra of smaller variety. 



6. Ditto of larger, which is mitriform. 



7, 8. Thecse immature. 9. Long section of No. 7- 

 10. Theca with calyptra. 



31. Female flower. 12. One of the cellular bodies found 

 associated with the Pistilla. 



13. Pistillum, base of highly magnified, shewing the cell 

 from which the seta is developed. 



14. Apex of style, shewing its peculiar structure and dilated 

 stigmatiform apex. 



15. Young sporula. 



The same, Plate CVIII. Fig. II. 



1. Portion of axis shewing the auxiliary nature of the male 

 flowers, and the terminal one of the female. 



2, Anthers, and barren ditto ? 3. One of these latter 

 which are chiefly circumferential detached. 



4. Abortive or immature Pistillum. 



5. Mature ditto with a barren one, the situation of the 

 ovulum distinctly shewn, 



