SPRUCE ON CEPHALOZIA. 185 
tains one of the most curious forms that have = found amongst 
the hepatics, viz. Cephalozia ephemeroides §., found by the author 
in Venezuela, growing on moist earth in ae eas ‘on little 
mounds thrown up by mud-worms, and appearing ini mk tare bee A 
a greenish confervoid film, like the pirbtomenta of a It 
one o 
speaking, neither stem nor leaves, but from the base of the pro- 
thallium arises a female flower, and at the end of the thread-like 
branches of the prothallium are male spikes. 2. Pteropsiella okt a 
subgenus represented by a —— Leiter P. frondiformis §., 
by the author in South Amer is species is one which 
iiindtrates the difficulty of Satine upon the divisions ‘ fron 
ae aerate for pate ~ is entirely destitute of stem-leaves, 
3. Zoopsis, a genus founded by Hooker to include the J. ar 
of Taylor, a species which has occupied the especial attention of 
several ns aap rat or pee and Leitgeb. 
The plan mbraced en a flat ribbon-like 
the original species 
4. argentea Tayl. and 4. setulosa Leitg., — oe really bilobed 
leaves, a fact overlooked by all previous writers. lobiella 8. 
named by Gottsche in his honour. It had, however, = previously 
collected by the author, and named in his MSS. Z£. lancifolia, but 
not being published the well-merited pe ae? name of 
Gottsche must stand. In this subgenus the leaves are normally 
y 
aaa ae with large pellucid elongate cells. 5. Eu-Cepha- 
lozia §. is a subgenus typified by our common J. bicuspidata, and 
comprising the oe t bulk of the Cephalozia of the north temperate 
zone. 6. a subgenus, founded by Mitten as a in babe 
to Odontoschisma denidotum: and has the trigonous perianth and 
which we may cite the common J. divaricata as an exa: 
Especially interesting to the British Sepabulagies. is the 
