Moore — On Irish Hepaticce. 645 



chila tridenticulata, Dumort. Eev. Jung. p. 15, et Ilepat. Europ. 

 p. 43 ; G. L. et IST., Synop. Hep. p. 26 ; Carring. Brit. Jung, part 

 3, p. 63, pi. 3, fig. 10. 



Hab. Moist ground, among the larger mosses, &c. This pretty and 

 distinct species is mostly confined to the southern counties in Ire- 

 land, and is generally scattered in small tufts among other herb- 

 age. Cromaglaun, Dr. Taylor and Dr. Carrington. Brandon and 

 Connor Hill, Kerry. 



5. PlagiocMla exigua, Taylor. Stems straggling, ascending, slightly 

 branched, crowned with minute capituli, which at length elongate 

 into new shoots. Leaves round-obovate, remote, patent, the lower 

 bifid, nearer the apex trifid, or ciliate. Fructification unknown. 



Jungermannia exigua, Taylor, in Trans. Bot. Soc. Edinb. 1, p. 179; 

 Carring. Brit. Jung. pi. 4, fig. 13 (good). Plagiochila exigua, 

 G. L. et N. Synop. Hep. p. 659 ; Dumort. Hepat. Europ. p. 46 ; 

 Carring. Brit. Hepat. pi. 4, fig. 13 ; Cooke, Brit. Jung. p. 5, 

 fig. 48 (bad). 



Hab. About the bases of moss-covered trees at Cromaglaun and 

 Killarney, where it was discovered by Dr. Taylor, who de- 

 scribed it in 1843. At same place, 1873, where it is not rare; 

 0' Sullivan's Cascade, and Glena, 1875. This singular and very 

 minute plant is most likely to be observed when some of the 

 larger kinds are under microscopical examination ; among many 

 of these it frequently makes its appearance in the Killarney 

 gatherings. The stems are seldom more than one-fourth of an 

 inch long, being more or less clothed with small, distantly- 

 set leaves, which increase in size as they approach the apex of 

 the stem. 



Mtlia, Bennett, Gray. 



Jungermannia, Hook. Brit. Jung. p. 15, n. 46, 47 (1816); Dumort. 

 Recueil, l,p. 16, n. 16(1835). Mylia, B. Gray, in Gray's Nat. 

 Arr. Brit. PI. 1, p. 693(1821). Leptoscyphus, Mitt, in Hook. 

 Lond. Journ. Bot. 3, p. 358 (1851), Coleochila, Dumort. Hepa- 

 ticai Europe, p. 105 (1874). 



Involucre oligophyllous, bracts connate at the base. Colesule terminal 

 (or, from the growth of innovations, axillary), cylindrical, com- 

 pressed at the apex, mouth cleft. 



1. Jfy^/fls JfeyZon (Hook.), B.Gray. Dioecious. Stems ascending, slightly 

 branched. Leaves 2-ranked, succubous, roundish, concave, reticu- 

 lations large. Amphigastria subulate. Colesule ovate, slightly 

 compressed at the mouth, truncate, deeply cleft in a bilabiata 

 form. Antheridia in the axils of perigonial leaves. 



Jungermannia Taylori, Hook. Brit. Junger. t. 34; Engl. Bot. t. 2318; 

 Lindenb. Synop. Hepat. p. 24 ; Dumort. Syll. Jung. p. 48 ; 



