18 Scientific Proceedings, Royal Dublin Society, 



thought different from the type; I therefore sent them to Professor 

 Lindberg, who identified them as G. coralloides and C. ohtusa. 

 Though closely allied to each other, they are nevertheless quiie 

 distinct from C. crenulata, and when our eyes get accustomed to 

 their distinguishing characters they will be easily recognised, 

 and no doubt will be found to be as widely distributed as the old 

 species. I have made rough drawings of both species to enable 

 the student to distinguish them. The material at my disposal 

 for drawing was not all that could be wished, having been a long- 

 time collected and sterile. A good description and figure of C. 

 coralloides is given in Carrington's British Hepaticse, Part 1., 

 page 9, PL I., Fig, 3. It is very rare in Scotland, and has a 

 geographical range northwards to Lapland. I have lately re- 

 ceived a packet of specimens of C. ohtusa from Mr. J. Sim, who 

 collected them on Mount Strade, Aberdeenshire, October, 1880, 

 and they agree in every respect with the Irish specimens named 

 by Lindberg. 



Cesia, Bennett Gray. 



Jungermannia. Lightfoot, Fl. Scot. 2, p. 786 (1770) ; Hook. 

 Brit. Junger (1816). Cesia, B. Gray, in Gray's Nat. Arr. Brit. 

 PI. I., p. 705, 1851. Gymnomitrium, Corda, in Opiz. Beitr. 1, 

 p. 651, 1829. 



Involucral leaves several, Colesule wanting. Bases of the pistil- 

 lidia immersed in the hollow apex of the stem. Antheridia 

 axiUary. Amphigastria none. 



Gesia coralloides, Lindberg, 



Resembling the common C. crenulata, Gott, but smaller and 

 not so much branched, branches erect, clavate, of a dull white 

 colour, growing in compact patches. Leaves closely imbricated, 

 emarginate, margin plane with none of the cells projecting as 

 in C- crenulata. 



Hab. Brandon Mountain, county Kerry — Dr. Moore, 1840. 



Gesia ohtusa, Lindberg. 



Closely allied to the preceding, stems erect, regular in outline, 

 longer and more slender, very much branched, of a dark ohve 



