No 4. (07 LAURE 41944 
en 
REVUE BRYOLOGIQUE 
Paraissant Tous LEs Deux Mois 
Les manuscrits doivent être écrits en français, en latin ou en anglais 
Sommaire du n° 4 
* Mosses and Hepatics of the Magnesium limestone of West Yorkshire. 
W. INGHAM. — Notes sur la flore bryologique de la Tarentaise et de la 
Maurienne (fin). R. SÉBILLE. — Les cellules opaques et les espèces du 
genre Odontoschisma: HusNor. — Drepanocladus scorpioïides forma 
suffocata. POTIER DE LA VARDE. — Bibliographie. — Nouvelles. 
Mosses and Hepatics of the Magnesium limestone 
of West Yorhshire 
by W. INGHam B. A. — York (England) 
Running from south to north in West Yorkshireis à narrow 
band of magnesian limestone. This band is unusally dry most of 
the‘ year and is honeycombed with numerous quarries from 
which stone has beën obtained for the building of churches in 
olden times, and for the building of houses in many of the villages. 
It would scarcely be expected that bryophytes would be at 
home on such dry soil, but there are crevices of the-rocks and 
shady places where they are to be found. During the Summer 
months, plants on the open ground are paréhed, and others are 
covered by grasses and other vegetation, s0 as to be well-nigh ont 
of sight. IE is only during the winter months that these plants are 
in evidence, and during this time there are little pools of water 
in some of the quarries, in which some mosses grow. 
As I have been privileged to wander over this limestone tract 
during various months of the year, it may be of interest to bryo- 
logists if 1 give an account of the mossés and hepaties of this 
district. 
A$ one of the quarries will be frequently mentioned; viz. Jack- 
= daw Crac Quarry, 2? 1/2 miles from Tadcaster, I propose to indi- 
_ Cate this by the letters J. C. Q. This quarry is a very old one, and 
stone was obtained from it for the building of York Minster, but 
_ for very many years no stone has been taken from it, sothat 
_mañy phanerogams as well as cryptogams have had ample time 
to make à home there. ns 
