66G Proceedings of the Royal Irish Academy. 



Antrim, up to the present time : good specimens from thence are 

 in the herbarium from the Ordnance Survey, at the College of 

 Science, Dublin. 



3. Metzgeria linearis (Sw.), Lindb., Monogr. n. 6. Dioecious. Stems 



robust, much elongated, dichotomous, of equal breadth through- 

 out, their margins much reflexed, nearly meeting so as to make 

 the stems appear half round when diy, in transverse section 

 sub-elliptic, hairs very long, in twos or threes together, spreading 

 widely, and arcuately bent. Fruit (?) 



Jungermannia furcata, var. /3. elongata, Hook. Brit. Jung. tab. 56, 

 fig. 2 ; Ekart, Syn. Jung. tab. 1, figs. 1, 2, p. 67. J. furcata, 

 p. maxima, "Weber, Spicil. PL Goett. p. 160. 



Hab. In moist situations on the ground. I collected this remark- 

 able plant in some quantity in a small stream which empties 

 itself into the deep lake at the top of the glen leading up to the 

 highest poiat of Brandon Mountain, in 1865. The plant was 

 altogether in the water, and the stems were from 4 to 5 inches long. 

 Believing it to be quite distinct from M. furcata, I sent it to 

 some of our best authorities, who thought otherwise. It there- 

 fore remained for Dr. Lindberg to establish the species, who also 

 collected it in 1873, at Cromaglaun, &c. He states in his obser- 

 vations on the Hepaticee collected in Ireland, 1873, that he 

 possesses specimens of the same plant from l^orth America, the 

 islands of Jamaica and Gruadeloupe ; Sikkim, Himalaya ; IS^ew 

 Zealand ; and from Sutherland shire in Scotland. The Irish 

 specimens have neither male nor female fruit. 



4. Metzgeria conjugata (Dill.), Lindb., Monogr. n. 7. Autoecious. — 



"Stems robust, not much elongated, more or less dichotomous, 

 irregularly pinnated or decomposite linear, but narrower in some 

 parts than in others, in transverse section semilunar, mai'gins 

 remote, hairs longish, singly or often in pairs on margin, and 

 divergent." 



Bisch. Handb. Bot. Term. tab. 56, fig. 2756 ; Dill. Hist. Muse. tab. 74, 

 fig. 45; D. et E. Hedw. Theor. Gen. 1 ed., tab. 19, figs. 9, 99 et 

 100, tab. 20, figs. 101-109 ; 2 ed., tab. 21, figs. 4, 5, tab. 22, figs. 

 1-9; Sturm, Deutschl. El. 2, fasc. 26, 27, tab. 38 ; Aust. Hep. Bor.- 

 Am. n. 117 (inflor.); Eunck. Crypt. Gew. Eicht.fasc. 21, n. 438; 

 Gottsche et Eabenhor. Hep. Eur. exsic. n. 274-6. 



Hab. Glena and Tore Cascade, on the bark of old trees. 0' Sullivan's 

 Cascade, Killarney, among Hookeria Igetevirens, Dr. Lindberg, 

 1873. Not being acquainted with this plant, the description and 

 quotations of authorities are after Lindberg, in "Acta Societ. 

 Scientiarum Eennicte, x." Judging from the figures in Dil- 

 lenius, it would be readily passed over for a state of Riccardia ; 

 so also from the the smaller fig. in Hedwig's Theoria, No. 99, but 

 the magnified fig.. No. 100, shows the plant to be a true Metz- 



