114 LEJEUNEAE OF THE UNITED STATES AND CANADA 
manniaceae and the Metzgeriaceae of recent American authors. 
Among the species referred to this genus are three which would 
now be included in the Lejeuneae. These are /. serpyllifolia, J. 
transversalis and J. clypeata. The first of these is a species which 
we share with Europe. It is the type-species of the genus 
Lejeunea, as originally described, and is now known as Lejeunea 
serpyllifolia Lib. or preferably as L. cavifolia (Ehrh.) Lindb. 
Apparently Schweinitz did not really know this species from 
America, the specimens so named in his herbarium being partly 
Kadula tenax Lindb. and partly Frullania Virginica Gottsche. 
The second species is not the true West Indian J. transversalis 
Swartz, as Schweinitz supposed, but is the same as his J. clypeata, 
which he correctly distinguished as new. This third species is now 
referred to the genus Archilejeunea. Apparently in ignorance of 
Schweinitz's paper, Lehmann, in 18 38, described the same species 
as new under the name Lejeunea Dorotheae. 
In 1841 and in 1845 two important exsiccatae of North Ameri- 
can bryophytes appeared in which several Lejeuneae were included. 
In the first of these, Drummond's Mosses of the Southern States, 
the specimens were determined by Wilson and Hooker and, in the 
case of new species, were accompanied by printed descriptions. 
The Lejeuneae of this collection are labeled Jungermannia serpyl- 
folia, J. auriculata and J. parvula, the last two being described as 
new. The first of these is not correctly determined and is in fact 
a mixture of two distinct species, Euosmolejeunea duriuscula (Nees) 
and Lejeunea Americana (Lindb.), proposed as a species in the 
Present paper. |. auriculata is the type of Mastigolejeunea auricu- 
lata Schiffn., a species now known to have a wide distribution in 
tropical America. J. parvula, however, is apparently the same as 
the European Cololejeunea minutissima ( Sm.) Schiffn., which has 
subsequently been collected many times in our Southern States. 
In the second exsiccata, Sullivant’s Musci Alleghanienses, we find 
six Lejeuneae—Phragmicoma clypeata, Lejeunea serpyllifolia, L. 
serpyllifolia var., L. cucullata, L. calcarea and L. minutissima. 
The first and last of these are correctly determined. Of the re- 
mainder, Z. serpyllifolia is really Z. Americana; L. serpyllifolia 
var. is Euosmolejeunea duriuscula; L. cucullata, although com- 
pared by Sullivant with a specimen communicated by Montagne, 
