338 MR ROBERT KIDSTON ON THE FOSSIL PLANTS OF THE 



notice from the Kilmarnock Coal Field, but I have seen another Scotch example from 

 Stannous: Pit, near Airdrie, Lanarkshire, from the basement beds of the Lower Coal 

 Measures, immediately above the Millstone Grit, which was collected by Mr K. Dunlop. 

 It also occurs in the Lower Coal Measures of Northumberland. 

 Locality. — Grange Colliery, Kilmarnock. (A. Sinclair.) 

 Horizon. — Shale over Stranger Coal. 



Lepidodendron Landsburgii, n.sp. 



(Plate III. figs. 9, 9a, 10, 10a, 106.) 



Description. — Stem attaining large dimensions, and bearing two opposite vertical rows 

 of distant, large oval discs ( = ulodendroid scars), whose umbilicus is situated very slightly 

 below the centre. Leaf-cushions, from almost touching to more or less distant, quadrate- 

 rhomboidal to narrow elongate-rhomboidal, apices twisted in opposite directions and 

 prolonged into a keel which connects the preceding and succeeding leaf-cushion in the 

 same spiral series. Leaf-scar large, placed above the centre, rhomboidal, upper margin 

 rounded triangular, lateral angles prominent and produced into two ridges, which meet 

 the sides of the cushion about its centre, lower boundary of leaf-scar rounded with concave 

 sides, from the upper and lower rounded angles of the leaf-scar extends a ridge which 

 joins the keels connecting the leaf-cushions. Vascular cicatrices not shown. The bark 

 between the leaf-cushions is ornamented with oblique irregular flexuous striae. 



Remarks. — Several specimens of this fine species have been sent me by the Rev. D. 

 Landsborough. A small portion of the largest is shown on Plate III. fig. 9, and is there 

 represented about half natural size. This example is 28*5 centimetres long and 25 

 centimetres wide, but its complete width is not shown, as the specimen is broken on one 

 side. The large discs are very far apart, their distance from each other on this example, 

 measured from their margins, is 18 '5 centimetres. Neither of the discs is complete, but 

 this is the only fossil I have seen which shows their distance apart — all the other examples 

 bearing the large scars, only show one. The leaf-cushions on the left hand of this speci- 

 men are closer than those on the right hand, and are only separated from each other by 

 the caudate keels which connect the various members of a spiral series with each other. 

 On the right hand they are slightly more distant and separated by a slight interval, in 

 the centre of which the connecting caudse run, the bark between being ornamented with 

 flexuous irregular oblique striae. A portion of this specimen is enlarged on Plate III. fig. 

 9 a to show these characters. The cushions are longer, in proportion to their breadth, in 

 this example than in that shown at fig. 10, their length to their breadth here being as 

 25 to 11. On this specimen the leaf-scar is not shown. 



At Plate III. fig. 10 is given another figure of the same species. Here the leaf- 

 cushions are more rhomboidal than on that last described, their length to their breadth 

 being about 9 to 5, but these proportions are not constant, the measurements given are 



