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SECTION II. PLEUROCARPI. 
SUBSECTION I. GYMNOSTOMI. 
XXX. HEDWIGIA. 
1. H. .estiva, Hooker. Fr. Autumn. 
Anictangium comp actum, Sckwaegr. Teesdale — R. Spruce. Rocks at 
tlie White force and High force — A. O. Black. Rocks at Hell gill, 
Guisborough moor — W. Mudd. Moist rocks in Greensclough, Tod- 
morden, near the boundary of the county. 
SUBSECTION II. PEBISTOMI. 
DIY. I. APLOPERISTOMI. 
XXXI. PTEROGONIUM. 
1. P. GRACILE, Swartz. 
Teesdale (B. G. 727) reports this alpine species as occurring on 
“ trunks of trees near Castle Howard, but scarce.” Mr. Spruce has 
found it in Teesdale, but only on the Durham side of the river. 
XXXII. LEUCODON. 
1. L. sciuroides, Schwaegr. Fr. Summer. 
Braunia, B. and S. Trunks of trees and bushes ; common. 
DIY. II. DIPLOPERISTOMI. 
XXXIII. NECKERA. 
1. N. pumila, Hedw. Fr. Winter. 
Trunks of trees in Ray wood, Castle Howard ; but very rare — Tees- 
dale. Gillaleys wood, Castle Howard — M. B. Slater. Trees in Hol- 
wick wood, Teesdale — R. Spruce. Studley woods, near Ripon — 
J. G. Baker. 
2. N. crispa, Hedw. Fr. Winter. 
Rocks at Hornby, but seldom in fructification — Teesdale. Macker- 
shaw wood, near Ripon — W. Brunton. Rocks in Teesdale and 
Wharfdale — R. Spruce. Rocks on the western edge of the oolitic 
moorlands ; plentiful, but becoming rarer amongst the dales east- 
ward — J. G. Baker. Went Yale, near Pontefract — J. W. Watson. 
