506 Mr. Valentine's Supplementary Observations on 



hours, in which the red granules on the surface appear to have been partially 

 removed by the action of the acid. It is clear, from this instance, that the 

 outer coat is in itself colourless and pellucid. 



Lastly, to complete the analogy, the sporules of Mosses and of some other 

 tribes commence their germination by the emission of the internal lining 

 membrane in the form of a tube, which is exactly analogous to the pollen- 

 tubes. In the Mosses these tubes increase by the addition of a series of fresh 

 tubes at their extremities, and at length a bud containing the rudiments of 

 stem, leaves and roots is formed, which may be considered analogous to the 

 embryo or young bud in the seed of the more highly organized plants. 



Tintinhull, near Ilchester, 

 Feb. 18, 1839. 



EXPLANATION OF THE PLATES. 



Tab. XXXV. 



Fig. 1. Plants of CEdipodium Griffitidanum, of the natural size. 

 Fig. 2. A plant magnified. 



The following Figures are all highly magnified. 

 Fig. 3. A leaf. 



Fig. 4. Apex of a leaf. 



Fig. 5. One of the gemmiform bodies which are found in the axillae of the 



leaves. 

 Fig. 6. Transverse section of the same. 

 Fig. 7- Calyptra. 

 Fig. 8. Longitudinal section of a mature theca and upper part of the seta, 



passing through three of the stomata. 

 Fig. 9. Transverse section of a very young theca. a. The two layers of the 



thecal membrane, b. The two layers of the sporular membrane. 



c. A layer of sporules. d. Three layers of mother-cells, in which the 



sporules have not yet been secreted, e. The columella. 

 Fig. 10. One of the mother-cells, with its partially developed sporules removed 



and more highly magnified. 



