NOTES ON JAPANESE HEPATICyE I49 



C/iciloIcjcunca interiexta (Lindenb.) Steph., which has also 

 been listed as a Japanese plant. The type specimen of this 

 species was collected by Dr. Mertens in the Caroline Islands, 

 and has been kindly sent to the writer for examination by Dr. 

 von Keisslern, of Vienna. The species has a rather wide dis- 

 tribution in the islands of the Pacific. In well-developed 

 plants the lobule has almost the same form as in L. -plant- 

 loba. The apical region, however, is built up on a different 

 plan and shows the distal hyaline papilla which is character- 

 istic of the genus Cheilolejeunea} In some cases the proximal 

 papilla in L. -planiloba cannot be easily demonstrated, because 

 it bends down behind the apical tooth and is more or less con- 

 cealed (PI. VI, fig. 14). From the genus Rectolejeunea? which 

 is also characterized by a proximal papilla, the new species 

 must be excluded on account of its 5-keeled perianth. At the 

 same time its close resemblance to certain species of this genus, 

 such as the West Indian R. fhyllobola (Nees & Mont.) Evans, 

 should not be overlooked. 



8. LEPTOLEJEUNEA SUBACUTA Stephani, new species. 



(PI. VII, figs. 1-9.) 



Pale yellowish green, often becoming brownish with age or 

 upon drying, growing scattered or in thin depressed mats ; stem 

 prostrate, 0.05'mm. in diameter, closely adherent to the sub- 

 stratum, copiously branched, the branches widely spreading, 

 often microphyllous toward the extremities ; leaves distant to 

 loosely imbricated, the lobe widely spreading, plane or slightly 

 concave, rhomboid-oblong, the antical and postical margins 

 subparallel, 0.5 mm. long, 0.25 mm. wide, attached by a short 

 and almost longitudinal line of insertion, antical margin rounded 

 near base but scarcely reaching the middle of the axis, slightly 

 curved, or, in the outer part, nearly straight, postical margin 

 straight or nearly so, forming a continuous line with the keel, 

 lobe gradually narrowed to a rounded, obtuse or rarely subacute 

 apex, margin entire throughout; lobule oblong-ovoid, 0.17 

 mm. long, 0.12 mm. wide, inflated to beyond the middle, keel 



1 See Evans, Bull. Torrey Club 33 : 2. pl.i,f.4. 1906. 



2 Ibid. 33: 8. 



