SCAPANIA. 213 



or slightly branched, black, suberect or erect ; radiculose, rootlets 

 moderately plentiful, hyaline. Leaves horizontally inserted, 

 slightly ascending, closely imbricate, regular, of almost equal size, 

 somewhat pectinate, bilobed barely to the middle, lobes subequal 

 or the antical about a third smaller, convex, ovate or trapezoid, 

 acute or sometimes apiculate, crossing the stem, entire or slightly 

 dentate, postical lobe broadly oval or obovate, acute or sometimes 

 apiculate, subentire, textare firm, epidermis very finely verruculose, 

 cells small, roundish-subquadrate, walls thick, angles thickened, 

 trigones wanting. Bracts similar to upper leaves or slightly 

 larger, lobes subequal, subentire. Perianth projecting considerably 

 beyond the bracts, oblong- obovate, compressed, mouth wide, 

 laciniate, irregularly spinose-dentate. Capsule small, oval ; spores 

 light brown ; elaters short, bispiral, dark brown. 



Male stems more slender than the others, perigonial bracts 

 terminal or at the middle, little different from ordinary, smaller, 

 ventricose ; antheridia 2, oval, with long bearers, along with several 

 leafy paraphyses. Sometimes gemmiparous, gemmse greenish- 

 white in colour, terminal on the upper leaves of sterile stem. 



Fruits April, May, June. 



Dimensions. — Stems 1 to 2 inches long, '3 mm. to "4 mm. 

 diam., with leaves from 2'5 mm. to 35 mm. wide; leaves, antical 

 lobe 1*5 mm. x I'mm., postical 1*5 mm. x 1' mm., antical 1'25 mm. 

 X -75 mm., postical 1"75 mm. x T mm., antical 1"5 mm. x -70 mm., 

 postical 1*75 mm. x 1*25 mm. ; cells 'Old ram., "02 mm., 0275 mm. 

 X '015 mm.; bracts, anticallobe 175 mm. x 1* mm., postical 2- mm. 

 X 1* mm.; perianth 2*75 mm. x I'l mm., lacinias at mouth of 

 perianth '275 mm., cilia ditto '125 mm. ; spores •0125 mm. ; 

 perigonial bracts, antical lobe "75 mm. x "G. mm., postical 

 1"25 mm. x '7b mm. ; antheridia -15 mm. x •125 mm. 



Hab.— Growing usually on limestone rocks. Kare. 8. Lover's 

 Leap, near Buxton, C. J. Wild. Miller's Dale, Derbyshire, W.ILP. 

 10. Winch Bridge, Teesdale, Dr. SprNcc, July 1843. Wharfdale, 

 Dr. Spruce, Dec. 1841. Linton, G. A. Holt. 1(5. On sandy 

 banks, near the sea, Moidart, West Liverness, S. M. Macvicar. 



Found on the Continent. 



