BRITISH HEPATIC^. 11 



subvertical, emarginate or entire. Amphigastria present only in 

 the species with round leaves. Androecium terminal, sub-spicate. 



Obs. — ^A section of Pezizse Vas named Swrcoscyphus (Fries, Syst. Mycol. ii. p. 78 

 (1823). Na/rdiv^ is perhaps too much lite Nardus, a genus of Grasses (Lin. Syst. 

 Nat. 1 ed. (1735) ). Still the two are distinct, and unlikely to be confounded with 

 each other. 



After repeated dissections of the involucre, I cannot find any essential distinction 

 between Sarcosoyphua and Alicularia, except what depends upon the form of the leaves, 

 ■which in the former are emarginate, and somewhat compressed from before backwards, 

 whilst in the latter they are entire, nearly 'plane, and laterally compressed. On section 

 through the lower third of the involucre, it will be seen that in both cases it is terete 

 and fleshy. Amphigastria enter into its composition in all the species. 



Southhya, again, is only a connecting link between Nwrdia &ndi Jungermannia, in 

 which the coles ule is a little more free. 



Under the sub-tribe Gcdocaules the authors of Synop. Hepat. place only Oottschia, 

 N. ab E. (1844) =: Schiafochila, Dumort. (1835) ! and yet nearly the same structure, 

 the perforated thalamium is found in various genera of the Foliose and Frondose Hepa- 

 ticse, and supplies a valuable character, whether for the discrimination of species, or 

 their classification. 



Whenever the capsule is covered partly by the calyptra, and partly by the hollow 

 apex of the stem, and its investing leaves, we find the colesule either wanting or rudi- 

 mentary. To this modification. Dr. Lindberg {On Zoopsia, p. 193) proposes the name of 

 calyptra thalamomitriece. The same type is in Synop. Hepat. called " calyptra cum 

 perianthiis,'' vel " involucro," vel " toro concreta vel connata." That the affinities of 

 the species had not escaped the author of Brit. Jung., the following note under J. com- 

 pressa (t. Iviii.) will prove : — " In the present species, as well as in J^. scalaris and 

 J. emaa-ginata, and probably in all the Jungermannise which have an immersed calyx, 

 this part has the appearance of being nothing more than the extremity of the stem 

 incrassated, and hollowed out" for the reception of the pistUlse ; for the texture of the 

 calyces always resembles that of the stem, and they are never deciduous, as is the case 

 with exserted calyces." 



a. Ma/rsv/pella, Dumort. 



1. NaRDIA SPHACBIiATA. 

 Pl. II. Fig. 5. 



Stoloniferous ; stems slender, flexuose ; leaves rather distant, 

 vertically patent, obovate, from a narrower vaginate base, emar- 

 ginate, lobes ovate, rounded, sinus acute, margin plane or inflexed ; 

 involucre oblong, connate only at the lower third, segments deeply 

 lobed. 



Jvmg. sphacelata, Giesecke, in Lindenb. Syn. Hep. p. 76, t. i. f. 9, 13, hene !. 

 Hiibener, Hep. Germ. p. 122. 



Ma/rsupla sphacelata, Dum. Syll. p. 78, n. 113. 



Swrcoscyphus sphacelatus, N. ab Es. Europ. Leberm. i. p. 129 ; Gott. & Rab. 

 Hep. Eur. Ex. no. 519, & 255, c. icone (upper figs. only). 



Fl. Damica, t. 2812. San-coscy. Sullivantii, De Not. Muse. Alleg. n. 216. 



2T(vrdia sphacelata, Carring. Tr. Ed. Bot. S. v. x. p. 378 (1870). 



