NOTES ON JAPANESE HEPATICVE 1 47 



as being covered over with slender seta-, similar to those found 

 on the lobes, and no trace of a false median nerve is shown, the 

 cells of the lobe being fairly uniform throughout, except that 

 the basal cells are longer and destitute of set;e. In the speci- 

 mens from Tosa the lobule is perfectly smooth ; in the outer 

 portion, close to the end of the keel, the free margin bears a 

 slender tooth, usually composed of 2 superimposed cells, and 

 there is commonly a second blunt tooth somewhat nearer the 

 axis ; the margin is otherwise entire. In well-developed leaves 

 there is a fairly distinct false nerve, composed of 1 or 2 rows 

 of elongated cells. Unfortunately the writer has been unable 

 to secure specimens of C. vcnusta for comparison, so that it has 

 been impossible to determine whether these differences are real 

 or simply due to inaccuracies in the figures. 



7. LEJEUNEA PLANILOBA Evans, new species. 



(PI. VI, figs. 11-16.) 



Pale green, not glossy, scattered or in loose depressed mats ; 

 stems prostrate, loosely adherent to the substratum, 0.08 mm. 

 in diameter, sparingly and irregularly branched, the branches 

 widely spreading : leaves loosely imbricated, the lobe obliquely 

 to widely spreading, slightly convex but not reflexed at the apex, 

 scarcely falcate, oblong, 0.7 mm. long, 0.4 mm. wide, antical 

 margin decurrent by a single cell, rounded to subcordate at the 

 base, arching partially or wholly across the axis, outwardly 

 curved to the broad and rounded apex, postical margin more 

 or less outwardly curved, continuous with the keel or forming 

 with it a very obtuse angle, margin entire throughout ; lobule 

 ovate-rectangular, 0.25 mm. long, 0.15 mm. wide, inflated in 

 basal half, keel arched near the base, nearly straight in outer 

 portion, smooth, free margin appressed to the lobe except at base, 

 straight or slightly curved, sinus straight or very shallowly lun- 

 ulate, apical tooth straight and blunt, papilla proximal, usually 

 in a distinct depression, reflexed and more or less concealed be- 

 hind the margin ; leaf-cells plane or nearly so, averaging 12 /j. 

 at the margin of lobe, 21 x 15 ft in the middle and 30 x 18 ;i at 

 the base, thin-walled but with distinct and rarely confluent tri- 



