1904 M'Ardle. — Sligo Conference, Bryophyta. 213 



Jungrermania riparia, Taylor.— On wet rocks, Kuocknarea Gleu. 

 J. crenulata, Smith, *var. g-racillltna, Smith. — Damp bank in 



Glencar. 

 *J. inflata, Hudson.— On peat at Collooney. 

 *J. turbinata, Raddi.— Kuocknarea Glen, on wet rocks. 

 J, ventricosa, Dicks. — On decayed wood, Glencar, Collooney. 



*Var. porphyrolcuca, Limpn— On Sphagnum on Kuocknarea. 

 J. incfsa, Schrader.— Kuocknarea Glen, Strandhill, Collooney. 

 Saccogyna vitlculosa, Linn.— Hazelwood, Glencar, Kuocknarea 



Glen, Ivissadill. 

 Pellia epiphylla, Linn.— Damp banks, Hazelwood, Glencar waterfall, 



Kuocknarea Gleu. 

 P. calyclna, Taylor.- On wet rocks at Glencar waterfall, Hazelwood, 



Knockuarea Glen. 

 Aneura multlflda, Liuu.--Damp banks, Glencar, Kuocknarea Glen, 



Collooney. 

 *A. latifrons, Liudberg. — On decayed wood at Glencar. 

 *A. ping-uis, Linn.— On wet rocks at Glencar. 

 IVIetzgreria furcata, Linn.— On the trunks of trees at Hazelwood, 



Rockwood, Lissadill, Knockuarea Glen, Colloone}^ Glencar woods. 

 *IVI. conjugata, Liudberg.~Ou the trunks of trees, Collooney, Knock- 

 uarea Gleu, Glencar. 

 IVIarchantia polymorpha, Linn.— Kuocknarea Gleu, ri\er bauk at 



Sligo. 

 Conocephalus conicus, Neck.— Lissadill, shores of Lough Gill, 



Glencar waterfall. 

 '^Lunularia cruciata, Linn.— Old walls by the River Garvogue. 

 Glasneviu. 



Note on Pirate 12. 



The photograph shows one of the large bosses of calc-sinter or 

 "petrified moss" often met with in limestone districts. The oozing 

 water, highly charged with lime in solution, begins to evaporate on 

 exposure to the air, and, losing carbonic acid, the excess of calcium 

 carbonate is deposited. On this wet spongy material mosses begin to grow, 

 and these, by decomposing the carbonic acid in the water, materially 

 assist the process of precipitation, and their lower leaves and branches 

 become coated with a calcareous crust, the tips of the shoots continuing 

 to grow and to enlarge the boss. B in the plate is one of the large 

 Hypuums, H. coinuiiitahcm. A is a smaller more compact moss ( Weissia 

 verticillatd). Two liverworts are also present, Pellia calycina and P. epiphylla. 

 While photographing this boss, Mr. Welch observed some small dead land- 

 shells, of the genera Helix and Hyalinia, undergoing the process of 

 calcretiou in the sinter- -an interesting illustration of the manner in which 

 shells now extinct have been preserved in ancient deposits iu limestone 

 districts. The height of the section shown in the Plate is about 12 feet ; 

 the Marsh Thistles (C) on the right, 4 feet in height, give the scale. 



R, Liy. Praeger. 



