$4 The Irish Naturalist, 



capable of transporting the germs of our hepatics of tropical 

 type, from the torrid zone to Britain, and I venture to suppose 

 that their existence at Killarney dates from the remote 

 period when the vegetation of the whole northern hemisphere 

 partook of a tropical character." 



My own recent discovery of Radula vohita by the shores of 

 I,ough Cultra in the County Cavan, remote enough from 

 Killarney, its only other Irish habitat, further strengthens the 

 opinion held by this gifted observer. My specimens received 

 a searching examination at the hands of Mr. M. B. Slater, 

 F.i,.s. The late Professor lyindberg considers that the 

 Killarney plant is identical with specimens of Radida 

 Xalapensis, a native of Mexico (New Granada), also found at 

 Tullulah Falls, Georgia, United States. The late Dr. D. 

 Moore in his excellent work on the Irish Hepaticse^ agrees 

 with lyindberg and calls the plant Radula Xalape7isis. 



EXPI^ANATION OF Pl,ATE 3. 



Fig. I. Metzgeria conjugata, with adventitious shoots, x 150. 



Fig. 2. Metzgeria conjugata, showing adventitious shoots with secondary 

 branching, x 150. 



Fig. 3. Lejetmea serpyllifolia^ portion of stem and attached leaf-lobule with 

 young shoots, x 250. 



Fig. 4. Lejmnea serpyUifolia, portion of leaf-margin showing first stage in 

 growth of shoot, x 700. 



Fig. 5. Lejetmea serpyllifolia, further stage of growth, x 750. 



Fig. 6. Lejeunea serpyllifolia, leaf with six adventitious shoots, x 250. 



Fig. 7. Lejeiinea serpyllijolia^ leaf shoot with leaves, stipules, and root 

 hairs, x 400. 



^ Royal Irish Academy Proc. (2) Vol. ii., 1876. 



