492 Mr.R. Spruce on the Musci and Hepatice of the Pyrenees. 
“< Folia nonnunquam trinervia, 1. e. a lateralibus « e strato 
duplici cellularum constitutis.” M. P. /. ¢ | 
On the mountain (Superbagnéres) which rises at the back of the 
town of Bagnéres-de-Luchon, I gathered a Coscinodon, which differs 
considerably in the foliage from my specimens of C. cribrosus, but 
the fruit is too immature to afford any character. The leaves are 
smaller, erect at the base, then widely spreading, and finally incurved 
at the summit, strongly keeled, but quite destitute of plice: those of 
the perichetium remarkably large, three times the length of the stem- 
leaves. 
66. Grimmia, Ehrhart. 
Obs. The species of this genus are in the Pyrenees perhaps more 
conspicuous than those of any other. G. orbicularis and crinita were 
observed only on calcareous formations, and the latter only on mortar 
in walls: both in exposed sunny situations*, not rising to the region 
of coniferous trees. G. sulcata was noticed only on argillaceous 
schist. ‘The only species which never descend into the woody re- 
gion are G. sulcata and atrata. The following species are subalpine 
or alpine: G. patens, elatior, funalis, spiralis, incurva, Doniana, al- 
pestris and ovata; but nearly all of these are occasionally seen below 
the coniferous region, or towards the upper limit of Z,. The fol- 
lowing species are characteristic of the lower mountains, namely 
G. leucophea on granite or schist, and G. orbicu/aris on limestone. 
The region of coniferous trees (Z,, Z;) is marked by the frequent 
occurrence of G. ovata, commutata and elatior. The essentially alpine 
species (above-mentioned) are too sparingly distributed to impart 
any peculiarity to the vegetation. 
343. G. anodon, Br. Kurop. Grimmaia, p. 8. t. 1. 
Hab. 7, P. c. V. du Lys in saxis graniticis ; in rupibus mica- 
ceo-schistosis sylve Zransoubdt supra Oubat (Philippe !). 
344. G. crinita, Brid. Mant. p. 82; Br. Europ. ! 7. c. p. 10. t. 2; 
M. P. 268. 
Hab. Z,_, P. oce. in muris prope Pau. P.c. ad casarum mu- 
ros in pago Pouzac prope B.-de-Bigorre | (Philippe !). 
Specimens communicated by Dr. Arnott from Montpellier have the 
perichetial leaves alone piliferous, even the terminal ones of the ste- 
rile branches being muticous. In this character it precisely agrees 
with G. plagiopodia, Hedw. ; yet the calyptra is dimidiate, not mitri- 
form as in that species. 
345. G. pulvinata, L. Sp. Pl. p. 1586 (sub Bryo) 5 ; Br. Europ. 
l.c. p. 12. t.4; M. P. 269. 
Hab. hee in muris rupibusque umbrosioribus. 
346. G. orbicularis, B. et 8.! Br. Europ. /. c. p. 18. t.5; Wil- 
* In the Eastern Pyrenees, Dr. Arnott observed walls covered on the 
south side with G, orbicularis, and on the north side with G. pulvinata. 
