Evans: HEPATICAE OF PUERTO RICO 35 
Jispinulosa, is usually directed forward so that the long axis of the 
lobe is inwardly instead of outwardly curved. Of course the 
sharply toothed lobes would at once distinguish D. crucianella 
from LP. Araucariae and from LD. dissitifolia, two species which it 
resembles in habit, and also from D. didens. 
Drepanolejeunea infundibulata (Spruce) 
Lejeunea (Drepano-Lejeunea) infundibulata Spruce, Hep. Amaz. 
et And. IgI. 1884. 
Pale green, becoming brownish upon drying, growing in thin 
irregular patches : stems 0.04 mm. in diameter, closely adherent 
to substratum, irregularly pinnate, the branches obliquely to 
widely spreading: leaves distant, the lobe obliquely spreading, 
plane or with one or both margins slightly revolute near the apex, 
lanceolate, 0.5 mm. long, 0.15 mm. wide, straight or more or less 
falcate near apex, somewhat narrowed toward base and attached 
by an oblique line of insertion, margin entire or slightly denticulate 
from projecting cells, usually with a larger and sharper tooth com- 
posed of several cells near end of keel, apex acute to acuminate ; 
lobule ovate, inflated in basal and carinal portions, usually plane 
and appressed to lobe along free margin, 0.15 mm. long, 0.09 
mm. wide, keel arched, smooth or slightly roughened in outer 
part from projecting cells, free margin passing beyond apex by a 
lunulate sinus to end of keel, apical tooth strongly curved ; lobule 
often poorly developed; cells of lobe thin-walled and without 
trigones, averaging 17 x 13 at edge of lobe and 23 x I3 4 
in the middle; ocelli none: underleaves distant, basal portion 
broadly trapezoidal, 0.03 mm. long, marginal cells six, divisions 
widely spreading, sometimes as much as 180° and with a spread 
of 0.15 mm., each consisting usually of two cells in a row: inflo- 
rescence dioicous: @ inflorescence borne on a very short branch, 
innovating on one side with a simple and sterile innovation ; bracts 
erect-spreading, scarcely complicate, unequally bifid, the lobe lan- 
ceolate, 0.4 mm. long, 0.12 mm. wide, acuminate, margin sub- 
entire or irregularly denticulate, lobule 0.25 mm. long, 0.07 mm. 
wide, acute to truncate, margin as in lobe; bracteole connate on 
one side, oblong-obovate, 0.35 mm. long, 0.14 mm. wide, bifid one 
fourth to one third with obtuse to acute lobes and acute sinus, 
margin as in bracts; perianth long-exserted, narrowly obovoid, 
0.75 mm, long, 0.35 mm. wide in the middle, narrowed toward 
the base, truncate above and with a short beak, terete below, 
sharply five-keeled above, the keels extending outward and upward 
as acute, more or less spinose horns: ¢ inflorescence occupying a 
