422 HEPATIC^. 



thickened. Perianth campanulate, plicate, mouth wide, irregularly 

 obtusely lobate, lobes undulate. Calyptra somewhat fleshy. 

 Capsule globose, brown. Spores dark brown, tetrahedral-globose, 

 alveolate, with 7-9 very large and deep 5- and 6-angled pits, 

 regularly anastomosing, ridges membranaceous, sometimes appear- 

 ing to surround the spore, giving it a membranaceous border as 

 described by many authorities and figured by Lindberg and 

 Corbiere ; but as Mrs. Tindall, a most careful observer, remarks, 

 " The membranaceous border surrounding the spore is only the 

 continuation of the intersecting ridges or lamellae. There is no real 

 border." The projecting ridges around the spore vary from 10 to 



12. Elaters abundant, long and narrow, pale brown, 3 to 4 times as 

 narrow as the diameter of the spore, pale brown, bi-rarely tri-spiral, 

 loosely twisted with 20-24 turns. I have not seen the male plant. 



Dimensions. — Stems i^ to |- inch long x 2' to 4* mm. broad 

 with leaves; "3 mm. to "8 mm. broad x '3 mm. thick; leaves 

 2*5 mm. x 3" mm., 2* mm. x 1*5 mm.; cells "06 mm. x '05 mm., 

 •06 mm. X '04 mm., '045 mm. x -04 mm. ; perianth 2*5 mm. 

 x 2:5 mm. wide at the mouth; spores "03 mm., '04 mm. ; elaters 

 •225 mm. x "01 mm. 



Hab. — In damp sandy situations on the coast, forming wide 

 shallow patches. Eare. 



1. Kynall Clifl, Penzance, IF. Ciirnow. 7. ? 



I. Dingle Bay, Br. B. Moore, Prof, Lindhcrg ; Eoss Bay, 

 Br. Carrington. 



C. Jersey, J Piquet ; La Hauteur, Mrs. Mackenzie. 



Found on the Continent and in North America. 



Obs. — This is the largest and most distinct of our British 

 Fossombronice, the few deep pits on the spore along with the 

 membranaceous ridges distinguishing it. 



Description of Plate CLXXXV. — Fig. 1. Plants natural 

 size. 2-4. Leaves x 11 (Jersey, Piquet). 5. Portion of leaf 

 X 290 (ditto). 6-8. Cross-sections of stems x 24 (ditto). 

 9. Perianth x 11 (ditto). 10. Ditto, explanate x 11 (ditto). 

 11. Spore X 400 (Lindberg). 12. Ditto x 290 (Jersey, Piquet). 



13. Ditto X ? (ditto). 



