204 Evans: HEpPATICAE OF PuERTO RIco 
mm. wide, bifid from one third to one half with triangular, erect 
or connivent, acute to obtuse lobes separated by a narrow sinus, 
margin as in bracts; perianth about half exserted, cuneiform in 
outline with nearly straight sides, 0.85 mm. long, 0.7 mm. wide, 
antical face plane, postical keel low and broad, apex slightly emar- 
ginate and with a short beak, lateral keels sharp, extended upward 
as rounded, very narrowly bialate auricles, the wings sharply dentic- 
ulate with unicellular teeth: J inflorescence occupying a short 
branch or terminal on a longer one, sometimes proliferating from 
the apex ; bracts in six pairs or less, contiguous or loosely imbri- 
cated, strongly inflated and slightly bifid, the lobe more or less 
pointed and slightly denticulate, the lobule blunt and entire, keel 
strongly arched and narrowly winged in outer part, the wing cren- 
ulate and composed of a single row of cells ; bracteoles present in 
the lower part of the spike, similar to the underleaves, but smaller: 
mature sporophyte not seen (PLATE 10, FIGURES I-17) 
On bark of trees and on logs. North slope of the Luquillo 
Mountains, Heller (4716, 4738, 4743 p. p.). Also known from 
Martinique, /errottet, and recently collected by the writer in 
Jamaica. The type-locality is not definitely indicated by Stephani. 
C. angulistipa is about as close to Prionolejeunea as the pre- 
ceding species and is placed in Cyclolejeunca for essentially the 
same reasons. The cell-structure, however, in the present species 
would hardly separate it from Prionolejeunea, and the female 
branch, although normally long, is sometimes much abbreviated. 
The leaves, on the other hand, are usually conspicuously ocellate, 
and the marginal gemmae are very abundantly produced, being 
found occasionally even on the perichaetial bracts; both of these 
peculiarities indicate an alliance with C. convexistipa, although the 
gemmae are somewhat different in the two species. As in other 
species of doubtful generic affinity, the position of C. angulistipa 
must be determined from a combination of characters rather than 
from a single generic difference, and another writer might decide 
in favor of Prionolejeunea without violating the natural relation- 
ships of the plant. 
C. angulistipa is a smaller plant than C. accedens but is at the 
same time more robust on account of its thicker cell-walls and 
conspicuous trigones. The leaves are further distinguished by 
being ocellate and by the fact that their cells, although convex, 
lack the peculiar tubercles found in C. accedens. In the inflores- 
