( 102 ) 
continent, five others new to the Alaska region, and besides 
these two or three which have been rarely collected in Amer- 
ica. With the exception of the collections made by the Har- 
riman Alaska Expedition in 1899 and reported upon by Dr. 
Alexander W. Evans,* the number of species—24—secured 
by Mr. Williams is greater than that brought from Alaska + 
by any other collector. The literature bearing upon the Al- 
askan Hepaticae has been so fully discussed in the recent 
paper by Dr. Evans that nothing on that point need now be 
said. 
Marchantia polymorpha L. West Dawson, July 30, 
1899. 
Metzgeria pubescens (Schrank) Raddi. On rocks, Cafion 
City, March 27, 1898. 
Gymnomitrium coralloides Nees. On rocks, Lake Linde- 
man, May 5 and 8, 1898. In cafion above Lake Lindeman, 
April 8, 1898. 
Marsupella emarginata (Ehrh.) Dumort. Sheep Camp, 
March 29, 1898. A variety, also, of this species on rocks 
above Long Lake, May 24, 1898. 
Nardia scalaris (Schrad.)S. F. Gray. Dawson, Septem- 
ber 11 and October 2, 1898. Mixed with Lophozia Floerki. 
Jungermannia cordifolia Wook. Abundant in streams 
running into Lake Lindeman, April 9, 1898. Mixed with 
Scapania undulata. The leaves are more rigid and the leaf- 
cells have larger trigones than is normal, but the plants 
(sterile) agree with /. cordifolia in size, habit, form of 
leaves, etc. 
Lopuozia RuTHEANA (Limpr.). (/ungermannia Rutheana 
Limpr. Jahresb. Schles. Gesell. vaterl. Cult. 61: 207. 1884. 
Jungermannia lophocoleoides Lindb. Medd. Soc. Faun. et 
Fl. Fenn. 14: 66. 1887. Kongl. Sv. Vet.-Akad. Handl. 
23°: 41. 1889.) Paroicous. The species was originally 
described as dioicous. Lindberg, however, called attention 
* Proc. Wash. Acad. Sci. 2: 287-314. pl. 76-78. 10 O. I9g00. 
+ The word “‘ Alaska’? is employed in the present paper in a geographical 
rather than political sense. Most of Mr. Williams’ specimens came from 
British soil. 
