308 Mr. W. Mitten on the Mosses and Hepaticce of Sussex. 



Genus 5. Seligeria, B. et S. 



15. S. pusilla (Hedw.), B. et S. 



Weissia pusilla, Hedw. Eng. Fl. 



Not uncommon on chalk-stones about the Downs ; on stones at 

 Henley Hill near Midhurst. 



16. S. calcarea (Hedw.), B. et S. 

 Weissia calcarea, Hedw. Eng. Fl. 



On chalk about Lewes. 



The preceding species is very commonly mistaken for this, which 

 happens the more easily, as the form of 8. pusilla which grows on 

 the chalk is shorter-leaved than usual. 



Genus 6. Leptotrichum, Hampe. 



17. L. flexicaule (Schw.), Hampe. 

 Didymodon longirost7'is1, Eng. Fl. 



Abundant on the Downs, and rarely by roadsides ; always sterile. 



18. L. homomallum (Hedw.), Hampe. 

 Didymodon heteromallus. Hook, and Tayl. Eng. Fl. 



Rare ; it occurs at Blackdown, on Tilgate Forest, at the High 

 Rocks, and in some other places about Tunb ridge Wells. 



19. L. tortile (Schrad.), Hampe. 

 Didymodon pusillus, Hedw. Eng. Fl. 



In the stone-pit at Henfield in very small quantity, and on a sandy 

 bank near Hurstpierpoint, where it was very plentiful for one season, 

 1847, but has scarcely been seen since. 



Genus 7. Dicranum, Hedw., C. Miiller. 



20. D. spurium, Hedw. 



On Waterdown and Broadwater Forests near Tunbridge Wells, but 

 without fruit. 



21. D. scoparium, Hedw. 



Frequent in woods, and varying greatly ; the leaves sometimes all 

 straight, more commonly secund, and rarely, about the sand rocks, 

 ail falcate-secund. 



22. D. majus, Turn. 



D. scoparium, /3. majus, Eng. Fl. 

 Not common : confined chiefly to the neighbourhood of the sand 

 rocks, and St. Leonard's Forest. 



23. D. Bonjeani, De Notaris ; " dense caespitosum fragile erec- 



