RT ae Oe eee тү ы а. Васа ии 
PELLIA 15 
spicuous marginal laciniae, rarely proliferating, archegonia 5-18; 
calyptra strongly tuberculate : spores small, almost smooth, brown- 
ish-green. 
On old logs. Russian Gulch, near Mendocino (715) and at 
Sisson (50—associated with А. /afifrons). 
We have observed no calyptra or sporogonium in the Califor- 
nian plants and for the description of these parts have depended 
upon authors, especially Lindberg and Limpricht. 
In А. palmata, nearly the entire surface-layer of the thallus 
sometimes becomes resolved into gemmae, after which the plant 
appears more translucent and as if composed of larger cells. 
In one case alone out of many preparations from the specimens 
cited, we have seen what may have been a monoicous individual, · 
but here we were unable to determine with certainty whether the 
union was really organic or due simply to adhesion. 
METZGERIA Raddi, Atti Soc. Ital. Sci. Mod. 18: —(34). 1818. 
Mem. Mat. e Fis. Soc. Ital. Sci. Mod. 18: 45. 1820. 
In the manuscript on the Californian Hepaticae prepared by Dr. 
Watson and Mr. Austin (see page 10), there is to be found a short de- 
scription of Mefzgeria conjugata Lindb., followed by the remark : Е А 
few fronds, insufficient for proper determination, but apparently agreeing 
with this description, were found among the specimens of /rudlania 
Grayana, var., collected by Bolander." А ‘‘Metzgeria furcata Хеев” 
is included among the seven Hepaticae enumerated by Sullivant in the 
Report on the Botany of Whipple’s Expedition,* but whether this was 
collected within the limits of California or not is a matter of uncertainty. 
As we have seen no California specimens of Mefzgeria, we will not at- 
tempt any description of its species. It is hoped that the brief diagnosis 
given in the key to the genera of the Metzgeriaceae wil: suffice. for the 
recognition of the genus. At least two species of Metzger а OCCU 
farther to the northward on the Pacific Slope, and there is little doubt 
that the genus is represented in California. 
14. PELLIA Када, Atti Soc. Ital. Sci. Mod. 18: —(38). 1818. 
Mem. Mat. е Fis. бос. Ital. Sci. Mod. 18: 49. 990 
Gametophore a thin or somewhat fleshy, irregularly dichoto- 
mous, undulate-margined thallus without ventral scales, БӘТ 
in thick masses with imbricate-ascending lobes or scattered, brig 
* Pacific R. R. Survey, 4: 191. 1857. 
