KILMARNOCK, GALSTON, AND KILWINNING COAL FIELDS, AYRSHIRE. 339 



only an average. On all specimens the leaf- cushions vary a little in their relative length 

 to their breadth. On a few of the leaf-cushions of this example, the leaf-scar is pre- 

 served. In form it is rhomboidal with its upper and lower angles rounded, the lower 

 margin on each side of the lobe is concave (Plate III. fig. 10&). On none of my specimens 

 are the vascular cicatricules preserved. An enlarged figure of a portion of this specimen 

 is given on Plate III. fig. 10a, where the caudse are seen connecting the various leaf- 

 cushions of the same spiral series. This character is also seen in Plate III. fig. 9a. 



The large oval disc is well seen in Plate III. fig. 10, its length being 6 '5 centimetres 

 and its breadth 4*6 centimetres, measured across the almost central umbilicus. All the 

 bark has fallen off the large scar, except at a small part at its upper margin. On 

 another specimen, which is not figured, the large oval disc is 9 centimetres long and rather 

 over 6 centimetres broad. On another specimen, not figured, the leaf-cushions are more 

 distant than on any of the other examples, and they are also more elongated. The bark 

 intervening between them is ornamented in the manner already described. 



Fig. 10 is given natural size. 



Several specimens of this species have been found, but all were derived from the shale 

 over the " Whistler Seam," Bonnyton Colliery, Kilmarnock. 



Several years ago I received from Dr J. M. Macfarlane, late of Edinburgh, a specimen 

 of a large ulodendroid Lepidodendron, collected at Rosewell Colliery, Midlothian (Lower 

 Coal Measures). It is, however, not very well preserved, but I believe is referable to the 

 Kilmarnock species. The discs on the Rosewell example are very large, being about 13 

 centimetres long and 8*5 centimetres broad. Their distance apart, measured from the 

 outer limit of the discs, was 19*5 centimetres. 



There is no coal-measure Lepidodendron with which this species can be mistaken, its 

 nearest ally being Lepidodendron Veltheimianum, Sternb., from the Lower Carboniferous 

 Rocks (= Carboniferous Limestone and Calciferous Sandstone Series), but from this species 

 the characters I have already pointed out clearly separate it. 



I take this opportunity of acknowledging my great indebtedness to the Rev. D. 

 Landsborough, Kilmarnock, for the assistance he has given me in working up the fossil 

 flora of the Kilmarnock Coal Field, by applying the specific name of Landsburgii to this 

 Lepidodendron. 



Locality. — Bonnyton Pit, Kilmarnock. 

 Horizon. — Shale over Whistler Seam. 



Lepidodendron fusiforme, Corda. 



Sagenaria fusiformis, Corda, Flora d. Vorioelt, p. 20, pi. vi. figs. 1-7. 

 Sagenaria fusiformis, Feistmantel, Vers. d. bdhm. KohJenah., Abth. ii. p. 38, pi. xix. fig. 2. 

 Sagenaria rimosa, Geinitz (in part), Vers. d. Steinkf. in Saclisen, p. 35, pi. iii. fig. 15. 

 Sagenaria rimosa, Feistmantel (in part), ibid., p. 36, pi. xx. fig. 1. 

 VOL. XXXVII. PART II. (NO. 16). 3 C 



