106 YORKSHIRE NATURALISTS UNION. 
MARIOPTERIS ZEILLER. 
Mariopteris muricata Schl. sp. 
Ante, pp. 34, 72, 89. 
Additional localities. 
MIDDLE Coat MEASURES. 
Hor.— Skale over Chevet Rock. Loc.—Cadeby Colliery, 
Conisborough. 
Hor.—Barnsley Thick Coal.  Loc.—Woolley Colliery, 
Darton, near Barnsley. 
DACTYLOTHECA ZEILLER. 
Dactylotheca plumosa Artis sp. 
Sphenopteris crenata, Ante, p. 30. 
Dactylotheca plumosa, Ante, p. 35. 
Additional locality. 
MIDDLE COAL MEASURES. 
Hor.— Barnsley Thick Coal. Loc.—South Kirby Colliery, 
near Pontefract. 
REMARKS. — From the examination of additional speci- 
mens, from several Coal Fields, both barren and in fruit, 
I am led to believe that ‚Sphenopteris crenata L. & H., and 
the Zilicifes plumosa Artis, were only founded on different 
portions of the fronds of one species, and, further, that 
Pecopteris dentata Brongt., which I formerly regarded as a 
variety of Dactylotheca plumosa, is specifically distinct 
from it. 
Dactylotheca dentata Brongt. sp. 
Dactylotheca plumosa var. dentata, Ante, pr 30, 
Additional localıty. 
MIDDLE Coat MEASURES. 
Hor.— Barnsley Thick Coal. — Locs.--South Kirby Col- 
liery, near Pontefract ; Monckton Main Colliery, near 
Barnsley. 
ALETHOPTERIS STERNB. 
Alethopteris lonchitica Schl. sp. 
Ante; pp. 37, 73) 59: 
Geol. Trans, Y.N.U., 1893. 
PRE 
