214 Evans: HEPATICAE OF PUERTO RICO 
not winged along the keel, shortly bifid (about one third), the lobe 
oblong, rounded, entire, 0.5 mm. long and 0.15 mm. wide, lobule 
nearly as large as the lobe, acute to acuminate, sparingly and 
irregularly denticulate; bracteole ovate, 0.35 mm. long, 0.15 mm. 
wide, bifid almost to the base with suberect or often connivent 
or overlapping acuminate divisions and a narrow sinus; perianth 
obovate, 0.95 mm. long, 0.5 mm. wide, rounded at the apex and 
with a very short beak: & inflorescence terminal on a leading 
branch or occupying a short branch, not proliferating; bracts 
imbricated, mostly in from three to ten pairs, diandrous, strongly 
inflated, shortly and subequally bifid with rounded divisions, the 
postical sometimes bluntly pointed, keel strongly arched; brac- 
teoles similar to the underleaves but much smaller and less deeply 
bifid with obliquely spreading acute divisions: capsule about 0.35 
mm. in diameter; spores yellowish green, minutely verruculose, 
about 20u in short diameter; elaters about 12” wide, the wall 
irregularly thickened. (PLATE 16, FIGURES I-9. 
On living leaves. Puerto Rico, without definite localities, 
Schwanecke, Sintenis (27). Sprengel describes the type locality 
of Jungermannia pellucida in the following words, ‘‘ad filices 
Ind. Occid.” The writer has not been able to study any of the 
original material but bases his conception of the plant upon @ 
series of specimens determined by various authorities. The species 
occurs in two fairly distinct modifications, the second of which is 
described below as a new variety. The typical form may be 
recorded from the following additional localities in the Americal 
tropics: Cuba, Wright; Jamaica, Underwood, C. E. Cummings 
N.L. Britton, Evans; Costa Rica, Pittier; French Guiana, Lepr veMt, 
Perrottet; Brazil, Endlicher, Pabst, Spruce, Glaziou. Material from 
the various collections mentioned, much of which is in the Britis 
Museum, has been examined by the writer. The specimen oo 
lected by Leprieur, however, which represents the type of Lejeune) 
ocellulata, is in the Montagne herbarium at Paris. Of African 
specimens two have been studied, one collected in 1814 by Beauva® 
at ‘‘Oware,” and the other by Rodriguez on the island of Maur 
tius. Both agree with the American plant, so far as can © 
determined by the fragmentary material. The Beauvais aa 
mens, one of which is in the Kew herbarium, represent the type 
L. albifolia, and show a certain approach to the variety de a 
below. As has already been noted, D. pellucida has been rep? 
