612 Proceedings of the Royal Irish Academy. 



Collin Glen, Co. Antrim, in 1837 ; very fine and bearing capsules 

 on trees in Glenfarn demesne, Co. Leitrim, 1875. Dr. Taylor 

 observed it at Woodlands, near Dublin. At Powerscourt, Wick- 

 low ; on Connor Hill, Kerry, it grows on the bare rock, along 

 with L. calyptrifolia, both of which were collected in company 

 with Dr. Lindberg, July, 1873 ; Kylemore Castle demesne, Co. 

 Gal way, 1874. I^ear Cork, Isaac Carroll, Esq. 



3. Lejeimea echinata (Hooker), Taylor. Autcecious. Stems hair-like, 



very minute. Leaves ovate, concave, acuminate, spinulose-den- 

 tate, saccate at the base. Colesule roundish, pentagonal. Anthe- 

 ridia singly or in pairs in axils of the perichsetial leaves. 



Jungermannia hamatifolia, ^. echinata, Hook. Brit. Jung. 51. Lejeunea 

 calcarea, Libert, Ann. Gen. Sc. Phys., 6, p. 373, t. 96, f. 1 ; 

 Dumort. Syll. Jung., p. 33, t. 1, f. 3, et Hepat. Europ., p. 19; 

 IS'ees, Europ. Leberm. 3, p. 293; G. L. et IS". Synop. Hepat., 

 p. 544 ; Eabenhor. Hep. Europ. exsic. n. 46, 283, 323 ; 

 Cooke, Brit. Hepat., p. 20, fig. 150. Jungermannia echinata, 

 Tayl. in Spruce's Muse, of Teesd., Trans. Bot. Soc. Edin. 2, p. 88. 



Hab. On limestone rocks. "Woodlands, Dublin, Dr. Taylor. Muck- 

 ross demesne, Killarney, growing on the stems and leaves of 

 Thamnium alopecurum, Dr. Carrington. In same situation and 

 on same moss. Dr. Lindberg (1873.) Limestone rocks, near 

 Tralee (1875). 



4. Lejeunea ovata, Taylor. Dioecious. Stems creeping, branched. 



Leaves incubous, obliquely set on the branches, and close toge- 

 ther, margins not serrated, bilobed, the larger lobe ovate-acute, 

 saccate, and inflated. Amphigastria small, obcordate, notched at 

 apex, segments obtuse. Colesule obovate, acute, and angled at 

 the apex. 



Jungermannia ovata, Dicks. PL Crypt. Brit. 3, p. 11, tab. 8, f. 6. 

 Jungermannia serpyllifolia, (3. ovata. Hook. Brit. Jung., n. 42. 

 Lejeunea ovata, Taylor, in G. L. et jS[. Synop. Hep., p. 376; 

 Spruce, Muse, et Hepat. Pyren. in Trans. Bot. Soc. Edm. 3, p. 

 212; Dumort. Hepat. Europ., p. 20. 



Hab. On the moss-covered trunks of trees, and also on the bare bark. 

 Yery abundant at Cromaglaun, Kerry, and through all the 

 Killarney district. Kear Belfast, Dr. Dickie. More sparingly 

 in the northern and eastern counties. Mr. Spruce has pointed 

 out good distinguishing characters between this and L. hamati- 

 folia in the work quoted. 



h. Leaves obtusely rotundate. 



5. Lejeunea microscopica, TajloT. Paroecious. Plant very minute, and 



stain-like. Leaves ovate-lanceolate, concave, acute, bluntly 

 dentate at the margin, patent. Colesule obovate, contracted at tho 

 mouth, subdenticulate. 



