110 Proceedings of the Royal Irish Academy. 



from an admirable description of the plant in Dr. Spruce's paper on 

 Anomoclada,^ a genus of South American Hepaticae. I sent specimens 

 of the Howth plant to Mr, M. B, Slater, p.l.s., of Yorkshire, an ex- 

 cellent authority on Liverworts, who says it is the plant I had made it 

 out to be, and that it is not common on the Yorkshire moors, where 

 it grows in company with Cephalozia catenulata. It has also been 

 collected by Dr. Spruce near Tunbridge Wells and other parts of 

 England, and is abundant in a fertile state along the western foot of 

 the Pyrenees on the rotting stumps of trees ; also in the Andes, and 

 on Mount Campania in Peru at about 1400 metres elevation. It is a 

 rare or overlooked plant in Ireland ; the only previously known locality 

 in this country is on the side of the Corslive Mountains, near Bangore, 

 Co. Mayo, where it was collected by the late Dr. Moore in 1859.* It 

 is plentiful in several places on the Hill of Howth, growing on moist 

 peat and on the decayed stems of TJlex and Erica ; most plentiful near 

 Ballykill plantation. 



Another species of the same genus (Cephalozia), which I find 

 plentiful in a few stations on the hill, is C. curvifolia, which abounds 

 most at Killarney, and is one of the most beautiful of all the Hepa- 

 ticse, not only from the elegance and singularity of its form, but from 

 its showy colours of white, rose, and purple ; it grows in neat, 

 compact strata, the stems of equal width throughout ; from their 

 convexity, the leaves looking like strings of small beads. Another 

 rarity which I found sparingly in the crevices of the rocks near the 

 Baily lighthouse, Anthelia juratzTcana (Limpr.), is also found in 

 Austria, Sweden, and Lapland, at high elevations ; and it has been 

 collected in 1880 by Mr. West, on moist rocks below the summit of 

 Ben Nevis, and I have since found it on Ireland's Eye and on Dalkey 

 Island. 



From the appended list I have chosen these few examples to 

 demonstrate that many of the Liverworts of the Hill of Howth are 

 very rare and interesting, and in the number of species by no means 

 below the average of any other similar locality on the Irish coast. 

 I enumerate thirty-six species, two of which are new to Ireland, 

 Cephalozia francisci (Plate III.), and Anthelia juratzkana (Plate IV.); 

 others are very rare ; and one, Cephalozia deyiudata, has only been 

 previously found in small quantity in the Co. Mayo. The follow- 

 ing fourteen species are new to the Co. Dublin, being additions to 



1 Journal of Botany, 1876. 



2 Dr. Moore on Irish Hepaticse, Proc. E.I.A., Science Sec. Ser., vol. ii.; p. 624. 



