Mr. R. Spruce on the Musci and Hepatice of the Pyrenees. 291 
Tribus 5. PrreRoGoNIAcEz. 
9. Leptodon, Web., Tab. Syn. Muse. 
108. L. Smithii, Dicks. Fasc. 2. p. 10. t.5. f. 4 (sub Hypno). 
Hab. Z,_; in arborum cortice circa Pau, &c. In Pyr. orien- 
talibus (Arnott ! Montagne!). Circa Burdigalam, socia Cryphea 
heteromalla, \egi. 
10. Pterogonium, Swartz. 
109. P. filiforme, Hedw. Musc. Frond. 4. t.7; M. P. 92. 
Hab. Z,_3 ad saxa et arbores, circa Cauterets precipue, fre- 
quens. 
“ Var. foliis secundis. P. heteropterum, Brid.? Br. Univ. 2. 
p- 176. Hab. in rupibus secus lacum Espingo prope B.-de-Lu- 
chon ;” M.P. 98. 
110. P. gracile, L. Syst. Veg. p. 952 (sub Hypno) ; M. P. 94. 
Pterigynandrum gr., Hedw. Muse. Frond. 4. t. 6. 
Hab. Z,~. 0 saxis Pyrenzorum, semper sterile; in arboribus 
sylyee Lespéron prope Aq. Tarbellicas Agri Syrtici fructiferum 
legi 20 Novembris, 1845. 
The leaves of this species, besides being papillose from the project- 
ing cellules, are tuberculate on the back in the upper half ; the tuber- 
cles arranged with some regularity parallel to the sides of the leaf, 
three or four cellules apart, and sprngias from the points where 
four cellules meet. 
111. P.? subenervium, Spruce ; dioicum ; caule prostrato, vage 
bipinnato, ramis ascendentibus, subparallelis ; folis e basi patula 
apice surrectis, ovatis oblongo-ovatisve, acuminatis, concayis, mar- 
gine inferior: leviter reflexis, integerrimis, nervo rudimentario vir 
ullo, areolatione guttulata. 
_ Hab. Z, im arborum cortice prope B.-de-Bigorre et Pau: ? sola, 
sterilis. 
Caules 4-1 unc., intricati, hic illic radiculos rufos emittentes. 
Folia saturate viridia, integerrima, margine tamen inferiori e cellu- 
larum parietibus prominulis subundulata ; nervo brevissimo, longi- 
tudine latitudinem haud excedente ; siccando appressa, apice autem 
recurva patulave : in ramis tenuioribus nonnunquam adsunt folia an- 
gustiora, acumine cirrhoso chlorophyllo carente instructa. Cellule 
discrete ; inferiores latitudine tertiam partem long. habent, supe- 
riores vix dimidiam; reflexus vero rotundate, minores, unde folium 
ibidem magis opacum videtur. Flores feminei ad caulem et ramos pri- 
marios nati; folia perichetialia, intimis minoribus subulatis exceptis, 
ovato-lanceolata, acuminata, serrata, cellulis marginalibus curvatis, 
enervia. Archegonia crassa, numerosa, 10 circiter, paraphysibus om- 
nino destituta. 
Folia tis Pt. gracilis haud absimilia, epapillosa autem et apice an- 
