ARBER : FOSSIL FLORA OF SOUTH YORKSHIRE COALFIELD. 149 
The fine specimen from Shipley Clay Pit, Derby, collected 
by Dr. Moysey, and figured on Plate XVI., Fig. 1, shows the spiral 
arrangement of the leaf-bases very clearly, and the fact that 
the leaf scars are mounted on prominent leaf -bases, which merge 
gradually into the bark, their margins being ill defined. The 
whole specimen is 15 cm. long, and 5.5 cm. broad. Seven spirals 
of leaf -bases are seen, though in several cases the distal portion 
of the leaf-base has been broken. 
The highest spiral shows 2 complete and 2 broken leaf -bases. 
The 2nd „ „ 4 „ „ 1 
The 3rd 
The 4th 
The 5th 
The 6th 
The 7th 
The spirals are about 1.8 cm. or less apart, and the leaf -bases of 
successive spirals alternate. The leaf -scars of each spiral are 
distant about 1 cm. or more. The bark between the leaf-bases 
is more or less smooth, with irregular, discontinuous, somewhat 
faint, longitudinal striae, either vertical or oblique. 
The leaf-scar is 6.5 mm. long, and 2.5 mm. across at its 
widest point. The lateral angles are small, sharp, and prolonged. 
The upper margin of the scar is flattened, the lower rounded. 
The prints on the leaf-scar are very indistinct, but one or more 
very minute " pin's-head " prints can be seen here and there. 
Lepidostrobus triangulare, (Zeiller.) 
Plate XVI., Fig. 3. 
1886. Lepidophyllum triangulare, ZeiUer, Flore Foss. Bass. Houill. 
Valenciennes, p. 508, Plate LXXVII., Figs. 4-6. 
1896. Lepidophyllum triangulare, Kidston, Trans. Yorkshire Nat. 
Union, Part XIX., p. 140. 
This cone, which in Britain is very infrequent, nearly always 
occurs in a fragmentary condition, the smaU, spear-head shaped 
bracts being isolated. They are then spoken of as Lepidophyllum 
triangulare. In the excellent example in Dr. Moysey 's collection, 
the cone is almost complete, a rare circumstance, and yet the 
form of the bracts can be made out, especially near the base. 
