324 Proceedings of the Royal Irish Academy. 



SuB-TEIBE PtILIDIE^. 



20. TricTiocolea tomentella, Ehrhart, Dumort. Jimgermama tomentella^ 



Ehrh. Beitr. 2, p. 150. Hook, Brit. Jung., tab. 36. Hanging 

 in dense tufts over the rocks within the spray of the waterfall. 



Stjb-teibe Teigonafthe^. 



21. Le])ido%ia setacea, "Web. Jungermania seiacea, Weber. Spicil. 



n. Grott, p- 143. Hook, Brit. Jung., t. 8. On moist banks 

 and. decayed wood, common. 



22. Ba%%ania trilohata, Linn. Jimgermama trilolata. Hook, Brit. 



Jung., t. 76. Mastigolryum trilolatum, Gr. L. et I^. Syn. Hep., 

 p. 230. On wet banks and rocks, common. 



23. Cephalo%ia divaricata. Smith, Humort. Jungermania divaricata, 



Sm. Eng. Bot., t. 719. On a damp bank, rare. 



Su£-TEIBE SCAPANOIDE^. 



24. 8cafania resupinata, Linn. Dumort. Jungermania resupinata, 



Linn. sp. PI., 1599. Eng. Bot., tab. 2437. J. reairvifolia, 

 Hook, Brit, Jung., t. 21, f. 8. Marfinellia gracilis, Liudberg, 

 Hepaticse in Hib., p. 620. Moore on Irish Hepaticse, p. 640. 

 On rocks near the waterfall, and on stems of trees near the 

 ground, bearing copious gemmae. Thi^ plant has frequently 

 been mistaken for Scapania nemorosa. It differs from all 

 forms of that species by the leaves being somewhat curved 

 downwards, having smaller cells and smaller teeth on the leaf 

 margins. The following description will enable students to 

 distinguish it. Tufts wide, compact, cushion-like, not easily 

 separated, colour olive-yellow or olive-brown, and sometimes 

 like the Tore waterfall specimens, pale light green ; disposed in 

 strata corresponding to each year's growth. The interior of the 

 tufts is of a fawn or dull green colour. Stems 20-90 mm. 

 long, erect, slightly branched, rigid, wavy, the secondary shoots 

 or innovations are densely leafy, slender with a crisped appear- 

 ance from the downward curving of the leaves. Boot-hairs 

 numerous, long, white, issuing from the base of leaves. Leaves 

 of uniform size, spreading, bifarious, closely imbricated, base 

 amplixicaul unequally 2-lobed for i or at most ^ their length, 

 more or less ciliately dentate. Lobes folded together in upper 



