Mr. R. Spruce on the Musci and Hepatice of the Pyrenees. 499 
a series of lozenge-shaped openings at the cellular angles. These 
openings are the sections of slender chlorophyllose cellules, running in 
lines from the base to the apex of the leaf, and having no communica- 
tion by pores with the perforated tissue in which they are interposed. 
{See fig. 3, which represents part of a longitudinal section through 
one of these series of chlorophyllose cellules, magnified about 600 
times.] These at once suggest the slender vermiform cellules simi- 
larly interposed in the prosenchymatous tissue of the Sphagna, of 
which the office is precisely the same, namely to contain the grains 
of chlorophyll*. 
Tribus 34. Spuacnacez#, C. Mueller. 
73. Sphagnum, Dillenius. 
381. S.acutifolium, Ehrh. Crypt. exsicc. n. 72; Schwgr. Suppl. 
t. 5; M. P. 325. 
Hab. Z, P. c. n rupibus humidis vallis Lesponne et secus lacum 
Séculéjo. 
382. S. cuspidatum, Ehrh. Crypt. 251; Schwgr. Suppl. t. 6. 
Hab. Z, P. occ. in turfosis prope Dax (Grateloup !). 
383. S. squarrosum, W. et M. It. Suec. t. 2. f. 1; Schwer. 
Suppl. t. 4; M. P. 326. 
Hab. Zz, P. occ. et c. mm rupibus humidis, locis Lesponne, 
Labassére et Mt. Crabioules. 
884, S. cymbifolium, Ehrh. Hann. Mag. 1780, p. 235; M.P. 
327. S. obtusifolium, Khrh.; H. et-T. Muse. Brit. p. 13. t. 4. 
Hab. Zo, P. c. in rupibus humidis faucis Gorge de Labassére 
dicte. P. occ. in palude turfaceo montis Goursi. Nusquam alias 
in montibus Pyrenzis mihi notum! In turfosis Agri Syrtici 
(Grateloup !). 
385. S. compactum, Brid. Suppl. Muse. 1. p. 18; Schwgr. 
Suppl. t. 3; M. P. 328. 
Hab. Z, P. oce. in Agro Syrtico, loco Landes de Mugriet, 
copiose. 
Tribus 35. AnpRE#AcEaz, C. Mueller. 
74. Andreea, Ehrhart. 
386. A. Rothu, W. et M. Cr. Germ. p. 386. t. 11; Schwegr. 
Suppl. t. 106; M. P. 829. 
Hab. Z,_, P. c. im rupibus graniticis juxta lacum Séculéjo, 
necnon in valle Castelloubon ; in rupibus micaceis ad marginem 
lacus Lehou (Philippe !). 
* Since this account was drawn up, Leucobryum glaucum has appeared 
in the ‘ Bryologia Europea ’ under the name of Oncophorus glaucus, and a 
description is given of its structure differing I believe in some slight parti- 
ceulars from what is here stated. 
32* 
