OF COAL-MEASURE PLANT-IMPRESSIONS. 175 
1855. Lepidostrobus ornatus, Goldenburg, Flora Sarapontana Foss. Heft i, p. 34, pl. B. 
figs, 3-5. 
1869. Lepidostrobus variabilis, Roehl, Palæontogr. vol. xviii. p. 142, pl. 7. fig. 2. 
1870. Lepidostrobus Geinitzii, Schimp., Traité Pal. Végét. vol. ii. p. 62, pl. 61. fig. 6. 
* 1870. Lepidostrobus variabilis, Schimp., ibid. vol. ii. p. 61, pl. 58. figs. 2a & 5; pl. 61. 
figs. 1, 2; pl. 62. figs. 35, 35 4. 
1875. Lepidostrobus variabilis, Feistmantel, Palæontogr. vol. xxiii. p. 218, pl. 43. pl. 44. 
figs. 1-2. 
* 1886-88. Lepidostrobus variabilis, Zeiller, Flore Foss. Bass. Houill. Valenciennes, p. 499, 
pl. 76. figs. 3-4. 
1886-88. Lepidostrobus ornatus, Zeiller, ibid. p. 497, yl. 76. figs. 5-6. 
1886-88. Lepidostrobus Geinitzi, Zeiller, ibid. p. 501, pl. 76. fig. 2. 
1890. Lepidostrobus Geinitzi, Renault, Étud. Terr. Houill. Commentry. Flore Foss. pt. 2, 
p. 927, pl. 61. figs. 5, 6. 
1893. Lepidostrobus squarrosus, Kidston, in Trans. Roy. Soc. Edinb. vol xxxvii. pt. 2, 
p. 942, pl. 4. figs. 13, 13a, & 14. 
* 1909. Leprdostrobus sp., Arber, Fossil Plants, p. 68, fig. 13. 
Diagnosis.— Cones cylindrical, elongated, not very narrow, very variable 
in size and shape, from 7 x lem. to 15 x 4 em. or more. Lamina (distal 
portion of sporophyll) lanceolate, small, erect, short. Cones homosporous. 
States of preservation.—These cones occur in the shales and clay-ironstone 
nodules of the Coal Measures in various states of preservation. Some 
examples show the true external surface, i. e. all that is seen is the imbricated 
series of sporophyll laminas. Very often, however, the greater number of 
the laminas, or distal portions of the sporophylls, are broken off or have 
undergone considerable decay before preservation. ‘This is of particular 
frequency in the ease of specimens occurring in clay-ironstone, and such 
examples may bear a very different appearance to the perfect cone. Such 
specimens have been frequently described as a distinct species, L. ornatus. 
The specimens described by Hooker in 1847 are good examples. Other 
impressions represent longitudinal sections through the cone, which may be 
either radial (in which event the axis is seen) or tangential. It is only in 
the former case that the characters of the sporophylls can be ascertained. 
RKemarks.—L,. variabilis as here defined is au extremely variable species. 
All gradations may be found between small and large cones with very slight 
differences in the shape of the sporophylls, depending chiefly on the size of 
the cone. A large type of cone has been distinguished by several authors 
under the name L. Geinitzi, Schimp., but of the figures accompanying 
these descriptions those of Schimper, Zeiller, and Renault (see above 
synonymy) alone show the characters of the sporophyl!s clearly. This type 
of cone is admittedly much longer and stouter than the ordinary forms of 
L. variabilis, but I am unable to see any real distinction worthy of specific 
rank as regards the characters of the sporophylls. Schimper in founding 
the species simply figures two sporophylls, which, except in size, appear to 
* Indicates figures of typical examples. 
