662 Proceedings of the Royal Irish Academy. 



Dilfena, Dumort. Comm. Bot. p. 114 (1822). Diplomitrion, Corda, 

 in Opiz, Naturalient. p. 653 (1829). Diplolaana, Dumort. Syll. 

 Jung. p. 82 (1831). Blyttia, Encll. Gen. PI. p. 1339 (1840). 

 Steetzia, Lehm. PI. Preiss. 2, p. 129 (1846). Moerckia, Gottsche, 

 in Eabenhor. Hep. Eur. exsic. n. 295 (1865). Pallavicinia, Carr. 

 Gray's Arr. of Hepat., Trans. Bot. Soc. Edinb. 10, p. 309 

 (1869). 



Involucre monophyllous, laciniated, cup-shaped. Colesule tubular, 

 exserted, frequently cleft at side. Capsule 4-valved, coriaceous, 

 naked. Elaters seminude, deciduous. 



Pallavicinia Hihernica (Hook.), B. Gray. Frond dichotomous, 

 ribbed, 1 to 3 inches long, prostrate, forked, margin crisped, 

 entire. Colesule arising from upper surface of the frond, double, 

 exterior very short, laciniated, interior much exserted, ovate- 

 oblong, subplicate. 



Jungermannia Hibemica, Hook. Brit. Jung. t. 78, et suppl. t. 4 ; suppl. 

 to Smith's Engl. Bot. 2, tab. 2750, excl. lower half of plate. 

 Dilasna Hibernica, Dumort. Comm. Bot. p. 114; Hepat. Europ. 

 p. 137. Diplolsena Lyelli, var. y. Hibernica, Nees, Europ. Le- 

 berm. 3, p. 345. Blyttia Lyellii, var. y. Hibernica, G. L. et IS". 

 Synop. Hep. p. 475. Moerckia Hibernica, Gottsche, in Eabenh. 

 Hep. Eur. exsic. n. 295, 334 et 335. 



Hab. On damp sandy ground, among the sand-hills near the sea, 

 where water has stood during the winter. Between Malahide 

 and Portrane, Co. Dublin, and at the North Bull. Very sparingly 

 in both places, and seldom fruiting. 



Pallavicinia Lyellii (Hook.), B. Gr. Frond oblong-linear, sub- 

 dichotomous, nerved, crenated or subserrated at margin. Peri- 

 chaetium fimbriated. Colesule cylindrical, double, rising from 

 the nerve on upper side of frond, the outer shortest, notched at 

 the margin, inner slightly toothed at mouth, and torn on one 

 side. 



Jungermannia Lvellii, Hook. Brit. Jung. t. 77; Lindenb. Synop. Hepat. 

 p. 96; Ekart, Synop. Jung. p. 68^ t. 10, fig. 87. Dilsena Lyellii, 

 Dumort. Comm. Bot. p. 114 (1822) ; Rev. Jung. p. 25 ; Hepat. 

 Europ. p. 137. Diplomitrion Lyellii, Corda, in Opiz, Natural, 

 p. 654. Blyttia Lyellii, G. L. et N. Synop. Hep. p. 475 ; Ea- 

 benhor. Hep. Europ. n. 121. Hollia Lyellii, Sullivant, Musci 

 Alleghanienses, p. 66, n. 281. Steetzia Lyellii, Lehman, Plant. 

 Preiss. 2, p. 129 ; G. L. et N. Synop. Hepat. p. 785. 



Hab. Boggy spots among Sphagnum. Eare. Near Bantry, Cork, Miss 

 Hutchins. Lough Bray, Wicklow, Dr. Taylor. Maghanabo glen, 

 near Fermoyle ; Castlegregory, and by the lakes between 

 Maghanabo Glen and Connor Hill, Co. Kerry. 



