26 Evans: HEpATICAE OF PUERTO RICO 
of the West Indian Islands, and on the mainland its range extends 
from subtropical Florida, through Mexico, to southern Brazil and 
Bolivia. It has also been reported from Africa and from the East 
Indies, but these records need confirmation. 
The original figures of Montagne and the accompanying text * 
leave little doubt as to the more essential peculiarities of the type 
specimens. These evidently represent a somewhat slender form of 
the species and fail to show some of the characters which are de- 
scribed above. On account of its great variability L. Sagraeana 
has been the source of considerable confusion, and its relationship 
to Lejeunea subfusca Nees, originally described from Java, is still a 
matter for discussion. According to Stephani { the type specimen 
of L. subfusca represents the ordinary form of L. Sagraeana. 
' For some reason, however, he maintains Z. Sagracanaas the name 
of the species, in spite of the fact that Nees von Esenbeck’s plant 
was published fifteen years earlier than Montagne’s. These views 
of Stephani were never quite acceptable to Schiffner,§ who con- 
tinues to regard L. subfusca as a well-marked variety of Z. 
Sagraeana and who even implies that the two plants may be 
specifically distinct. Through the kindness of Count Solms the 
writer has had the privilege of examining two stems of L. subfusca 
from the Nees herbarium, one of which was taken directly from 
the type material. Unfortunately the specimens are both sterile, 
but their loose and delicate habit and certain peculiarities in their 
leaves would seem to indicate that they are amply distinct from Z. 
Sagracana. The lobe is clearly falcate and measures 0.6 x 0.4 
mm., while the lobule is only 0.17 mm. long and 0.08 mm. wide. 
The water-sac occupies about half the lobule and extends outward 
from the base almost to the end of the keel. The basal part is the 
most strongly inflated, but apparently never bulges beyond the free 
margin. From the basal part the sac gradually narrows and opens 
outward by a flattened canal, bounded on the inside by the ap- 
pressed portion of the lobule and on the outside by the adnate 
portion and by the outer part of the keel. The adnate portion is 
* Ramon de la Sagra, Hist. Fis. Pol. y Nat. Cuba g: 464. pl. 18, f. 1. 1845. 
7G. L. & N. Syn. Hep. 315. 1845. (= /ungermannia subfusca Nees, Hep. Jav- 
36. 1830.) 
{ Hedwigia 29: 16. 1890. 
3 Bot. Jahrb. 23: 593. 1897.— Conspect. Hepat. Archip. Indici 296. 1898. 
