BRITISH HEPATICiR. 83 



Involucral bracts broader, roundish- ovate or trapezoid; lobes 

 nearly equal, obtusely pointed, irregularly denticulate ; ventral 

 margin reflexed, entire or lobate and repand ; lobule incumbent, 

 half concealing the colesule. 



Colseule (f. 26, 3) obovate-oblong, compressed in the plane of 

 the leaves, contracted and trigonous at the base. When young 

 convexo-concave, the margins and apex curved backwards, but after 

 the egress of the capsule more plane ; apex truncate, bilabiate, 

 laciniate-dentate. 



Capsule small, ovoid (f. 26, 3), dark brown, seated on a short 

 pedicel. 



Spores roundish, reddish-brown, granulose, t^oo" in diameter. 



Maters bispiral, y^g" to y^" in length, by ^aVo" broad. 



AndrcBcium terminal, sub-spicate on more slender shoots (-gV' 

 to tV"). 



JPerigordal leaves (f. 26, 7) five to ten pairs, more closely im- 

 bricated, erecto-patent, ventricose and vaginate at the base, entire 

 for three-fourths of their length ; lobes nearly equal, short, acute, 

 denticulate. 



Antheridia (f. 26, 9) axillary, oval, seated on a slender stipe. 



Oonidial cells (gemmse) rare, attached to the terminal leaves, 

 which they resemble in colour. Cells more or less densely aggre- 

 gated, elliptic-clavate, entire or bilocular, the interior filled with 

 minute olive-yellow chlorophyll granules. 



Obs. — To Prof. Lindberg is due the credit of first pointing out tlie distinctive 

 character derived from the papillose leaves, which separates (S'. asquiloba, not only from 

 S. resupinata with which it was generally confounded, but from all other Sowpanim. 

 " S. mquiloha" he writes, " optime diognoscenda videtur : cellulis foliorum minoribus, 

 rotundis, valde incrassatis, spatia trigona supremis qtioque ostendentibus, omnibus, 

 prasertim mediis papillas verrucseformes et in pariete cellulse confertas maximas 

 gerentibus." It is a more gracile species than *S'. resupinata,, the shoots more slender, 

 never zonate or having the tumid, squarrose habit of that species ; the leaves are more 

 remote, narrower ; lobes nearly equal, and of similar shape, acute and opaque, irre- 

 gularly dentate or entire ; ventral lobe slightly convex, not deflexed, and the colour 

 generally darker. 



Pl. VIII. Fig. 26. — Scapania ^quiloba. 1. Shoots natural size. 2. Por- 

 tion of barren shoot x 16. 3. Fertile shoot, vnth colesule and capsule x 16. (The 

 leaves are more deeply dentate than they should be.) 5. Stenv-leaf magnified. 7. 

 Perigonial leaf laid open, sJiomng the antheridia. 9. Antheridium x 250. 



4. Scapania Baetmngii, N. ah B. 



Pl. IX. Fig. 27. 



Shoots small, depressed, creeping, apex only ascending; leaves 

 entire, repand, patent from an erect vaginate base, shortly and 

 equally bilobed ; lobes roundish-ovate, cuspidate or mucronate, 



