168 



Structure and Affinities of Fossil Plants. 



Lepidostrobus insignis, Will. Loc. cit. Part 10, ' Phil. Trans.,' 

 1880, p. 502, figs. 11 and 12. 



Lepidodendron Spenceri, Will. Loc. cit. Part 16, ' Phil. Trans.,' 

 1889, p. 199, figs. 19 to 22; Part 19, 'Phil. Trans.,' 1893, p. 24, 

 figs. 41 to 50. 



Cone pedunculate ; peduncle bractigerous. Whole cone 8 — 10 mm. 

 in diameter. Axis, 3*5 — 5 mm. in diameter. Sporophylls, 2 — 

 2"5 mm. long ; lamina distinctly peltate, vertically elongated. 



Sporangia approximately spherical. Spores tetrahedral, becoming 

 spheroidal when free, with a hollow equatorial wing. Maximum 

 diameter of spore, without wing, about 0"14 mm. ; with wing, about 

 0'28 mm. Wood of axis without prominent angles, with or without 

 pith. 



Outer cortex containing distinct bands of sclerenchyma. 

 Locality, near Halifax and Huddersfield. 

 Horizon, Lower Coal-measures. 



2. Spencerites inajusculus, sp. nov. — Whole cone about 15 mm. in 

 diameter, axis about 9 mm. in diameter. Sporophylls about 3 mm. 

 long ; lamina obscurely peltate, as seen in radial section, but greatly 

 elongated tangentially, attaining a breadth of 3 mm. 



Sporangia approximately spherical. Spores having the form of 

 quadrants of a sphere, with three narrow wings. Maximum 

 diameter of spore, without wings, about # 11 mm. ; with wings, 

 about 0*15 mm. 



Wood of axis with about 30, somewhat jDrominent, angles; with- 

 out pith. 



Outer cortex uniformly sclerotic. 

 Locality, near Halifax. 

 Horizon, Lower Coal-measures. 



