RevteW* 
264 
Lopliocolea has a fifth species ( L. alata) granted to it; this 
scarcely seems more than a variety of L. cuspidata with the wings 
of the perianth more highly developed. The confusion between the 
two species, bidentata and cuspidata has been dissolved, and L. 
fragans replaces the better-known name of L. spicata. 
Cephalozia has fourteen species, nine species formerly placed 
under this genus being allocated to Cephaloziella; C. curvifolia is 
placed in Nowellia, a genus named after the Yorkshire botanist 
Nowell; C. trivialis and C. Curnowii are included in C. bifida , and 
C. jfackii in C. myriantha , the smallness of these plants and the 
minuteness of some of the distinguishing characters causing 
differences of opinion of a quite legitimate nature as to the de¬ 
limitation of these “small species.” 
There are six British species of Fossombronia, these being 
distinguished chiefly by the number of lamellae or papillae on the 
spores ; in Riccia there are twelve species, R. natans , on account of 
its structure being placed in the genus Ricciocarpus. The Palla- 
vicinia of most British authors is split up into two genera, Palla- 
vicinia with one species, P. Lyellii, and Moerckia with three; 
Conocephalum conicum represents our old friend Fegatella ; Pellia 
endivicefolia (calycina) appears in the unfamiliar guise of P. 
Fabbroniaua ; Nardia is represented by four species respectively of 
Alicularia and Eucalyx, and Mylia has been displaced by 
Leptoscyphus. The old genus Lejeunia is separated into six 
genera, Lejeunea in its more restricted sense having six British 
species, Cololejeunea four, whilst Harpcdejeunea ovata, Coluro- 
lejeunea calyptrifolia, Drepanolejeunea hamatifolia, and Micro- 
lejeunea ulicina have their own generic names. Marchesinia claims 
priority to Phragmicoma by a single year and Gymnocolea is restored 
to the generic rank from which it had been temporarily displaced, 
the common species, G. inflaia, having as a companion, G. acutiloba, 
of doubtful distinctness to G. inflata var. heterostipa, which has now 
found a resting-place from its tossings to-and-fro between Gymno¬ 
colea and Cephalozia. 
The more definite Jungermannia species are placed under 
Lophozia, containing twenty-six species, some of which are of 
doubtful specific value and can only be considered as “small 
species.” L. turbinata and L. badensis are often difficult to 
distinguish from each other, the cell-size and amount of thickening 
(“ trigones ”) at the cell-angles being variable in both plants. The 
three species, L. Floerkii , L. attenuata and L. atlantica, though 
quite distinct in their extreme forms, have many intermediates 
which are difficult to refer to either, as the author subtly says “two 
allied species vary in parallel lines so that the student may think 
that they have intergraded when such is not the case.” The 
abundance of moisture causes atlantica to approach Floerkii ; on 
the other hand, the drier ground form of Floerkii has a very similar 
facies to that of atlantica. There is a drier ground form of L. 
ventricosa which bears a somewhat similar relationship to the type 
as L. atlantica does to L. Floerkii. 
Scapania with twenty-one species still retains the limits usually 
assigned to it, being practically the only genus, having more than 
five species, with unaltered boundary. 
