ARBER : FOSSIL FLORA OF SOUTH YORKSHIRE COALFIELD. 14? 
The photographs of two of Dr. Moysey's specimens of this 
species, reproduced on Plate XV., Figs. 1 and 2, show the form 
of the pinnules and the nervation very clearly. The following 
are the chief characters of this species. Pinnules large, but 
variable in size and shape, broadly oval or ovate, entire, obtuse, 
symmetrical or unsymmetrical. Margin serrated, or slightly 
notched at intervals. Lower extremity of the base sometimes 
eared. Midrib very inconspicuous and impersistent, dissolving 
into spreading veins, at a considerable distance from the apex, 
sometimes scarcely persisting for half the length of the leaflet. 
Lateral nerves erect, slightly arched and spreading, dichotomising 
3-4 times. 
Asolanus camptotoBnia, Wood. 
Plate XVI., Fig. 1. 
1857. Sigillaria rimosa, Goldenburg, Flora Saraep. Foss., Heft. II., 
pp. 22, 56, Plate VL, Figs. 1-4; Heft. III., p. 43, 
Plate XIL, Figs. 7-8. 
1860. Asolanus camptotcenia, Wood, Proc. Acad. Nat. Sci. 
Philadelphia, p. 238, Plate IV., Fig. 1. 
1866. Sigillaria camptotcenia, Wood, Trans. Amer. Phil. Soc, 
Vol. XIII., p. 342, Plate IX., Fig. 3. 
1866. Sigillaria monostigma, Lesquereux, Report Geol. Surv. 
Illinois, Vol. II., p. 449, Plate XLIL, Figs. 1-5. 
1870. Sigillaria camptotcenia, Schimper, Traite Pal. Veget., 
Vol. II., p. 101. 
1877. Pseudosigillaria monostigma, Grand'Eury, Flore Carbon. 
Depart. Loire, p. 144. 
1880. Sigillaria camptotcenia, Zeiller, Flore foss. bass, houiller 
Valenciennes, p. 588, Plate LXXX\T:II., Figs. 4-6. 
1880. Sigillaria monostigma, Lesquereux, Coal Flora, Vol. II., 
p. 468, Plate LXXIIL, Figs. 3-6, 1880; Vol. IV., 
p. 793, p. 1884. 
1887. Sigillaria monostigma, Kidston ; Trans. Roy. Soc. Edinb., 
Vol. XXXIII., Part II., p. 397. 
1890. Pseudosigillaria monostigma, Grand'Eury, Bassin houill. du 
Gard., p. 262, Plate IX., Figs. 4-6. 
