REVUE BRYOLOGIQUE - CA 
No 657, ibid. is doubtfully O. crispum. There are someslight dif- 
ferences in the form of leaf, etc., and the accessory leaves also 
are variable in form and are not those of O. crispum. 
« M. crispum, n° 330, Hb. Griffith », in Hb. East India C°, Kew, 
is O. trichomitrium, — there are one or two capsules with calyptra. 
Q M. crispum. n° 335, Hb. Falconer », in Hb. East india C°, 
Kew, is M. rostralum. AE 
« M. crispum, n° 36, Hb. Falconer » ibid. is ©. crispum, rightiy. 
The nerve structure in Orthomnion iis much simpler than that 
of most species of Mnium ; it most resembles that of the Integerrimæ 
group of Mnium (M. punclatum, ete.), which have no stereids, nor 
are the « Deuter » cells clearly defined from the rest of the ground- 
lissue. Brotherus describes the nerve in Orthomnion as ‘‘mit einer 
centrierten Gruppe kleiner, düunwandiger Zellen”, but I have 
only been able to find the faintest trace of a Begleiter-group, and 
frequently none at all ; the Deuter cells being sometimes differen- 
tiated at the base of the leaf, more often almost or quite indistin- 
guishable from the rest of the ground-tissue, in which case the 
whole nerve section is almost homogeneous, the external layers, 
dorsal and ventral, showing a slightly increased incrassation 
merely. me 
My thanks are due for assistance given, especially to the 
authorities at Kew for facilities for examining the specimens in 
the Herbarium, to the authorities at the British Museum, and to 
Herr Loeske, Mons. Cardot and D' Levier. 
H. N. Dixon. 
Contribution à l’étude des Hépatiques de la Ht-Saôn 
(suite) sr 
par A. CoPPEY. | 
Lophozia gracilis (Schleich.)Steph. — Parois verticales et ombra- 
gées des rochers siliceux. Pourvu d’abondants propagules. — 
Roches de la Bouloie et du bois de Belonchamp. — Plateau de 
Melay. ES 
Lophozia inflata (Huds.) Howe. — Parois fraîches des rochers 
de poudingue, au plateau de Melay. 
Lophozia ventricosa Dum. — Rochers siliceux ombragés ou 
humides, surtout dans les montagnes. — Souvent pourvu de propa- 
gules entremélés ou non de quelques périanthes. — Présente une 
grande variabilité. — Planche des Belles filles (900-1100 m.), fertile. 
— Mont de Vannes. — Le Magny de Fresse. 
