164 MR. W. MITTEN ON THE MUSCI AND HEPATICJE 
in the large rounded cells of their leaves. In this particular they agree 
with that group of species which correspond with the Hookeria quadrifaria, 
Hook. Muse. Exot. t. 109, and which have been described in the Antarctic 
Floras under Bridel’s genus Pterygophyllum; but the habit is different 
and the entire appearance of the plants dissimilar. 
HYPOPTERYGIACEA, Mitten. 
Hypoteryeium, Brid. 
H. LARICINUM, Hook. (quoad specimina Menziesiana). 
Hab. Fernando Po and Island of St. Thomas, Mana. 
The inflorescence of this species is moncecious. 
POLYTRICHACEA, Schimp. 
PoryrRiCcnvuM, Dill. 
(Cephalotrichum, B. et S.) 
P. SIMENSE, B. et S. 
Hab. Cameroons Mountain, alt. 8000-10,000 feet, on the ground, Mann. 
(Lupolytrichum.) 
P. SUNIPERINUM, Hedw. 
Hab. Cameroons Mountain, alt. 8000-10,000 feet, Mann. 
P. COMMUNE, L. 
Hab. Clarence Peak, Fernando Po, on the very summit, Mann. , 
HEPATICAE. 
JUNGERMANNIA, L. 
J. DENTATA, Raddi. 
Hab. Cameroons Mountain, alt. 7000 feet, Mann. 
J. HIRTELLA, Weber. 
Hab. Cameroons Mountain, alt. 7000 feet, amongst Dicranum erice- 
torum, Mann. 
J. ABYSSINICA, Nees ab E. 
Hab. Cameroons Mountain, alt. 7000 feet, Mann. 
J. GEMINIFOLIA, sp. nov. Caule gracili repente, foliis oppositis direc- 
tione divergentibus devexisque convexis ambitu ovatis obtusis, mar- 
gine dorsali subrecto ventrali magis arcuato apice rotundato basi 
dorso ventreque connexis, cellulis grossiusculis intercalaribus distinctis. 
Hab. Island of St. Thomas, creeping on Sendtnera diclados, Endl., 
Mann. 
Very closely resembling J. perfoliata, Sw., in size, but apparently differ- 
ent in its more closely inserted leaves, which are more divaricate and more 
unequal-sided. 
