100 HEPATICJE. 



vittate, linear-lanceolate, narrow, about 3 times longer than broad, 

 to the middle or below acutely bilobed, lobes straight or divergent, 

 postical usually a little smaller, acuminate, entire, or rarely with 

 one or two small teeth at the base, margin often revolute, leaf 

 and segments channelled ; texture firm, epidermis rough, marginal 

 cells small, quadrate, pachydermous, middle elongate, about twice 

 as long as broad, margin of cells irregular, walls thick, angles 

 thickened, near the base the elongate cells contain very delicate 

 spiral filaments. ? terminal, capitate, bracts several pairs, closely 

 imbricate, attached at their base to the perianth, ovate-lanceolate, 

 margin denticulate, divided to about the middle, sinus acute, 

 segments lanceolate, acuminate. Perianth projecting about a third 

 beyond the bracts, ovate-oblong, strongly plicate, composed of one 

 layer of cells, mouth laciniate, almost to the middle, laciniae 8, 

 entire or sparsely denticulate. Calyptra small, orbicular, uni- 

 cellular, only somewhat thick near the base ; pistillidia about 20. 

 Capsule thick, composed of about 6 layers, inner layer with 

 numerous long, very narrow elaters attached to it. Spores large, 

 pale brown, elaters bispiral, reddish-brown, darker colour and 

 much shorter than those attached to the inner layer of capsule, 

 about half the breadth of the spores or less. Androecia terminal, 

 spicate, perigonial bracts about 12 pairs, closelj^ imbricate, erect, 

 ventricose at the base, oval-lanceolate, margin sparsely denticulate, 

 bilobed to below the middle, segments subulate-acuminate, anthe- 

 ridia solitary, large, oval, bearers long. 



Dimensions.— Stems 1 to 4 inches long, sometimes shorter 

 and even longer, diam. *2 mm. "3 mm., with leaves 2" mm. wide; 

 leaves 1*25 mm. x "4 mm., segments '75 mm., 2' mm.x "6 mm. 

 seg. 1'2 mm., 2' mm. x 7 mm., seg. 1*25 mm., 1-6 mm. x "7 mm. 

 seg. 1" mm., •75 mm. x '3 mm. seg. '4 mm.; cells, middle of leaf 

 '05 mm. X '02 mm., "04 mm. x "02 mm., '035 mm. x "02 mm., 

 marginal cells -02 mm. x '02 mm., *015 mm. x "015 mm.; bracts 

 4" mm. X 1*5 mm., segments 2- mm. ; perianth 6" mm. x 1*5 mm. ; 

 calyptra 1'5 mm. x 1" mm. ; pistillidia "3 mm. x '05 mm. ; valve 

 of capsule 2*25 mm. x 1' mm.; spores "03 mm. ; ela.ters free '1 

 mm. x "01 mm., '15 mm. x "01 mm., attached elaters "3 mm. long; 



