400 HEPATICA ANTARCTIC. 
(Aneura, Nees). 
69. J. multifida, L. 
Has. Lord Auckland’s group. 
(Metzgeria, Nees). 
70. J. furcata, L. 
Has. Campbell Island. 
71. J. argentea, n. sp.; fronde procumbente aggregato sub- 
- simplici lineari pellucida nervosa, cellulis majoribus rotun- 
datis margine prominentibus. 
Has. Lord Auckland's group. 
Patches small, lying about the roots of Musci and Hepa- 
tice, silvery white. Fronds nearly three lines long, flat, with 
an evident midrib, sometimes having one or two patent 
branches, usually however simple; on some of the wider 
fronds the cells projecting at the margin have the appearance 
of irregularly set, obtuse teeth, but they really are quite con- 
formable to the other cells. The fronds are destitute of 
colour. No fructification has been seen on this singular 
species. There is a rigidity in its habit which reminds one 
of certain of the Polyp tribes; but then it is possessed of 
roots, though rare and difficult to observe, it expands by 1m- 
mersion in water, and its cells seem analogous to those 
other frondose Jungermannie. 
(Marchantia, Linn.) 
12. J. polymorpha, Linn, 
Has. Campbell Island. 
luce 
On Stumonnsra,* a new Genus of Plants from California — — 
by Tuos. NvTTALL, Esa. 
(Tas. XVI.) | 
Masc. Calyx 5-parted. Stamina 10 to 12, inserted sepa- 
* In memory of Thomas Williams Simmonds, an ardent Botanist and | 
Naturalist, who accompanied Lord Seaforth to Barbadoes about the eg? 3 
1804, and died soon after, while engaged in exploring the ; 
Trinidad. 
