THE GENERA OF MOSSES. 
461 
PLATE XIII. 
Fig. 1. Theca of Splachniim ampullaceum. 2. The teeth, 
when 8, bigeminate. 3. Do., when 16, unige- 
minate. 
4. Theca of S. vascuhsum. 5. The teeth when bi- 
gemmate. 6. Do. when 16, unigeminate. 
7. Upper leaf of S. rugosum (Eng. Bot.) 8. Lower 
do. 9. Sporules. 
10. Thecseoi S. spharicum. 11. One of the teeth when 
quadrigeminate. \% One do. when bigeminate. 
13. Teeth when 16, unigeminate. 14. Sporules. 
15. Appearance of the fruit-stalk when highly 
magnified. 
16. A dry theca of S. WormskioldiL 17. A moist one. 
18. The opercului% 19. The teeth. 20. The 
fruit-stalk highly magnified. 
21. Theca of tenue, Theca of do. in the dry 
state. 23. Calyptra of do. 24, Teeth when 16, 
unigeminate, 
25. Theca, with the operculum, of aS'. angusfatum. 
26. One of the teeth when quadrigeminate. 27. 
Teeth when 16, unigeminate. 28. Sporules^, 
which are larger than in the other species, and 
of a yellow colour. 29- Leaf. 
SO. Theca of S. luteum, 31. Teeth. 32. Summit of 
columella. 33. Structure of tbe apophysis high^ 
ly magnified. 
Gen. XII. DissoDON nobis. 
Fruct. Calyptra primo mitriformis, mox saepius dimi- 
diata, albida, scariosa, tenera, lasvis, glabra, basi integra, 
