22 BRITISH HEPATICJi;. 



bracts (involucral) connate to near the middle, lobes slightly inflexed, very concave, 

 those of the involucre acute, calyptra large. 



" Plants rather stout, densely csespitose, ' nigree, apicihus viridifuscis.' Stems 

 ascending, entangled, slender, flexuose, fastigiate-ramose, radiculose at the base, and 

 producing long stolons, few-leaved, cortical stratum simple. 



" Leaves accrescent, margin erect, inferior ones patent from a somewhat contracted 

 base, quadrate-ovate, sub-amplexicaul, acutely emarginate, lobes rather acute, plane ; 

 superior ones with a broader base; sub-vaginate and saccate, broadly ovate, erecto- 

 patent, bearing two antheridia in their axils ; cells pentagonous- or hexagonous-rotund, 

 trigones distinct. Involucral bracts resembling the upper leaves, erect, connate below 

 the middle, lobes slightly inflexed, rather concave. Involucre 4- vel 5-fid, lobes acute. 



" All the other species are dioicous. Moreover, S. Funchii differs in slenderness, 

 leaves denser, erect, the texture of the involucre, cortical stratum of stem ' quincu- 

 octuplici,' &c. ; in S. ema/rginatus the leaves are dense, erecto-patent, emarginate, lobes 

 very obtuse, involucral bracts highly connate, and cortical stratum of the stem double, 

 &c." This form has not yet been met with in England. 



Pl. II. Fig. 6, n. — 5. Stem-leaf of N. adusta. 6. Section of involucre. 7. Ca^ 

 lyptra and capsule. 8. Ban-en shoot x 16. 9. Section of stem. 



5. Nabdia kevoltjta, Lindb. 



Stems matted and stoloniferous at the base, densely tufted ; 

 leaves sub-complicate, erecto-patent, imbricated when dry, rigid, 

 round or elliptic from a narrower semi-amplexicaul base, deeply 

 and acutely bidentate, margin narrowly reflexed throughout; 

 involucral leaves resembling those of the stem but larger. 



Sa/rcoscyphMS revolwtus, N. ab E. Leberm. Eur. ii. p. 419, iv. p. 34 (1836) j 

 G. L. N. Synop. Hepat. p. 8, n. 3 ; Hartm. Skaod. Fl. x. ed. ii. p. 84 ; Flor.' Danica, 

 Sup. t. 119, f. 2 (1865). 



Jimg. atrata, Mitt. Hepaticse of East Indies (Journ. Liu. Soc. 1859, p. 90). 



Nwrdia revoluta, Carring. in Grevillea, No. 18, p. 88, pi. 18, f. 19-25 (Dec. 

 1873); Lindb. Eevis. Grit. Fl. Dan. p. 113 (1871). 



Hab. Sent to Frof Idndberg, of Helsingfors, Aug. 1873, among specimens of 

 Andrcea, by Mr. David Orr, of Glasnevin, who collected it at Luggielaw, co. Wicklow,, 

 18S1 ! This rare species was first discovered in the Tyrol {Funck) ; it is also found 

 at Dovre, Norway, Bergyren (Herb. Lindberg) ; and in the Himalaya Mountains, 

 Hooker & Thompson (1306). 



Fronds densely csespitose, of an intense shining black colour, 

 creeping at the base. Stolons branched and entangled, of a brownish 

 colour, brittle, somewhat thinner than the stems, sparingly radicu- 

 lose. Stems ascending or erect, rigid, from half an inch to an inch 

 in length, stout, subligneous, sometimes producing from the axillse 

 of the terminal leaves two or more innovations, which are clothed 

 with smaller more erect leaves. 



Mootlets scanty, confined to the stoloniferous shoots. 



Leaves distichous, alternate, separated from each other by about 



