196 DIPLOPERISTOMI. [Brywn. 



trifariously inserted. Mohr has separated this from the other 

 two species of Meesia, in consequence of the segments of the 

 inner peristome, being connected hy a reticulated membrane, 

 (" opere reticuloso connexa.") We have, ourselves, seen por- 

 tions of a cellular or reticulated substance attached to these 

 teeth, which probably in an earlier stage connected them for 

 their whole length. The exterior teeth are short and obtuse, 

 as in the preceding species. 



5. B. dealbatum ; stems short, leaves lanceolate acute plane reti- 

 culated serrated at the points, capsule pyriform nearly erect. 

 (TAB. XXVIII.) 



Bryum dealbatum. Dicks. PI Crypt. Fasc. 2. t. 5. / 3. Smith, 

 FL Brit. p. 1350. Engl Bot. t. 1571. Turn. Muse. Hib. p. 115. 

 Hook. Fl. Scot. P. II. p. 149. Drummond, Muse. Scot. v. 2. n. 88. 

 Am. Disp. Muse. p. 43. 



Meesia dealbata. Swartz, Muse. Suec. t. 5. f. 10. Hedw. Sp. 

 Muse. t. 41. / 69. 



HAB. Boggy mountains in Scotland and Ireland. 

 This is less rare than B. trichodes, to which it has much 

 affinity ; but the foliage, when examined, will be found of a 

 different form and texture, and the fruitstalks are shorter in 

 proportion to the length of the stems. Athough this has all 

 the habit of a Meesia, it departs from the characteristic mark of 

 that genus, in having the external teeth nearly as long as the 

 internal peristome, and they can scarcely be termed obtuse. 



2. Teeth of the exterior peristome as long as the interior one. 

 * Leaves subulate. 



6. B. pyriforme ; stems slightly branched, leaves subulato-setace- 

 ous flexuose serrated nerve very broad, capsule pyriform 

 pendulous. (TAB. XXVIII.) 



Bryum pyriforme. Swartz, Muse. Suec. Moug. et Nestl. n. 31. 

 Hook. FL Scot. P. II. p. 149. Hobson, Brit. Mosses, v. 2. n. 75. 

 Arn. Disp. Muse. p. 45. 



Bryum aureum. Turn. Muse. Hib. p. 118. Smith, Fl. Brit. p. 

 1348. Engl. Bot. t. 389. 



Webera pyriformis. Hedw. St. Cr. v. I. t. 3. Funck, Deutschl. 

 Moose, t. 25. / 1. 



