base nearly half-way up, and more or less irregularly bifid above. The peristome of F. flavicans is of a deep yellow color, slightly twisted; its teeth cloven to the base; the segments long, slender, and uniform.
TAB. 29.—Desmatodon arenaceus.
1. Plantæ naturali maguitudine.
2. Planta fertilis.
3. Ramus antheridiophorus avulsus suoque marte degens.
4. Folium comale.
5. Folium inferior caulis.
6. 7. Areolatio folii apicis.
8. Eadem basilaris.
9. Sectiones transversales folii.
10. Folia pericha?tialia, vaginula, arehegonium et paraphysis.
11. Capsula operculata et calyptrata.
12. Eadem operculata.
13. Eadem deoperculata.
14. Peristomii dentes quatuor cum annuli particula.
15. Peristomium verticaliter sectum.
16. Sectio transversalis dentis peristomialis.
17. Operculum cum columellæ apice adherente.
18. Folium perigoniale.
