492 Mr. R. Spruce on the Musci and Hepaticce of the Pijrenees. 



" Folia nonnunquam trinervia, i. e. plicis lateralibus e strato 

 duplici cellularum constitutis." M. P. /. c. 



On the mountain (Superbagneres) which rises at the back of the 

 town of Bagneres-de-Luchon, I gathered a Coscinodoii, 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, e?-ect at the base, then loidely spreading, and finally incurved 

 at the summit, strongly keeled, but quite destitute of plica : those of 

 the perichcetium 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 

 consi>icuous 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, Dottiana, 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 sjjecies are characteristic of the lower mountains, namely 

 G. leucophcea on granite or schist, and G. orbicularis on limestone. 

 The region of coniferous trees (Z,,, Z3) 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. Europ. Grhnmia, p. 8. t. 1. 



Hah. Zg P. c. V. du Lys in saxis graniticis ; in rupibus mica- 

 ceo-scbistosis sylvse Transouhdt supra Ouhat (Philippe!). 



344. G. crinita, Brid. Mant. p. 32; Br. Europ. ! /. c. p. 10. t.2; 

 M. P. 268. 



Hah. Zo— 1 P. occ. in muris prope Pau. P. c. ad casarum niu- 

 ros in pago Pouzac^xo^t B.-de-Bigorre ! (Philippe !). 



Specimens communicated by Dr. Arnott from Montpellier have the 

 perichsetial leaves alone piliferous, even the terminal ones of the ste- 

 rile branches being muticous. In this character it precisely agrees 

 with G. plagiopodin, Hedw. ; yet the calyptra is dimidiate, not mitri- 

 form as in that species. 



345. G. pulvinata, L. Sp. PI. p. 1586 (sub Brijo) ; Br. Europ. 

 l.c.^. 12. t. 4; M. P. 269. 



Hah. Zo— 1 in muris rupibusque umbrosioribus. 



346. G. orhicularis, B. et S. ! Br. Europ. I. c. p. 13. i^ ; Wil- 



* In the Eastern Pyrenees, i)r. Avnott observed walls cover jn the 

 .south side with G. orbicularis, and cmi the norlh side with G. putt La. 



