€18 Froceedings of the Boyal Irish Academy. 



Europ. p. 22 ; G. L. et X. Synop. Hepat. p. 276. CaYendishia 

 laevigata, B. Gray, in Gray's Arr. Brit. PI. 1, p. 690. Porella 

 Isevigata, Lindberg, in Act. Soc. Sc. Fenn. ix., p. 335. 



Ilab. IS'ear Bantry, Hiss Hutchins. i!^ear Cork, Isaac Carroll. 

 Lough Bray, "Wieklow. 



Var. (S. integra (Dill.), Lindberg. Eillamey, Glena, on inundated 

 stones by the margin of the lower lake. Dr. Lindberg (1873), 



2. Porella 2Jlaty2}hylIa (Jj.), Lindberg. Stems irregularly pinnate, bran- 



ches nearly of equal length, sometimes crowded at the apex, where 

 they are obtuse. Leaves incubous, raised at their upper margin, 

 which is curved and undulated, more or less concave at the base, 

 and deeui'ved at the apex, mostly entire at the margin, lobule sub- 

 oblique, ovate-obtuse, or indistinctly a little acute. Amphigastria 

 adpressed to the stem, oblong-ovate or ligailate, slightly recurved 

 at apex. Antheridia in the axillEB of the perigonial leaves. 



Jimgermannia platyphylla, L. Sp. PL 1 ed., p. 1134; Wahlenb. Fl. 

 Lapp. p. 388, n. 704 ; Hook. Brit. Jung. t. 40, fig. 1 ; Hartm. 

 Skand. FL, 1 ed., p. 435. Cavendishia platyphylla, Gray's Nat. 

 AiT. Brit. PL 2, p. 690 ; Carruth. in Seemann's Journal Bot. 3, p. 

 301. Madotheca platyphvlla, Dumort. Comm. Bot. p. Ill, et Syll. 

 Jung. Eur. p. 31 ; G. L^ et K". Synop. Hep. p. 278, n. 30. 



Uab. On rocks and stones generally, but also on trees and moss-covered 

 banks. Frequent in many parts of Ireland. 



3. Porella Tliuja, Dicks. Stems tufted, branched subpinnately, con- 



vex and smooth above. Leaves closely imbricated, lobed, lower 

 lobe spreading, entire recurved, anterior ovate-obtuse, margin 

 reflexed. Amphigastria oblong, acute, entire, margin reflexed, 

 apex recui'ved. Involucral bracts for the most part ciliate-serrate. 

 "Tufts wide, olive-green; the older parts pui-plish brown, shining, 

 the shoots acuminated." — Taylor. 

 Lichenastmm Arboris Yitse facie, foliis rotundioribus. Dill. Hist. lEusc. 

 p. 502, tab. 72, fig. 33. Jungennannia Thuja, Dicks. PL Crypt. 

 4, p. 19 : Taylor, in Trans. Bot. Soc. Edin. 2, p. 116 ; Hook. Brit. 

 Jung. t. 40, nn. 3-4. Yar. /3. major et var. y. Thuja. Madotheca 

 Thuja, Dumort. Comm. Bot. p. Ill ; Syll. Jung. p. 31, et Hepat. 

 Europ. p. 24. 



Hab. On rocks and stones. Bantry, Miss Hutchins. Near Lough Finn ehy, 

 Dunkerron, Co. Kenw, Dr. Taylor. Loagh Bray, Co. AYicklow ; 

 Brandon, Co. Keriy (1864). 



4. Porella Cor daia7m,J)\\Tn.o-i:ii(tr. " Stems bi-tripinnate. Leaves ovate 



entii'e, attached obliquely to stem, auricles oblique, ovate, 

 slightly acute. Amphigastria subrotund, entii'e. Colesule bilabiate, 

 subcrenate." — Dum. 

 *' Jungennannia Cordteana, Hiiben. Hep. Germ. p. 291 ; De Xot. Prim. 

 Hep. Ital. p. 10 ; lEougeot et Nestl. Ciypt. Yog. n. 1044. Made- 



