FOREST OF WYRB AND TITTERSTONE CLEE HILL COAL FIELDS. 1049 



in impressions they are sometimes obscured by the ridges formed by the casts of the 

 furrows being bent slightly over them. 



Sigillaria Boblayi has some similarity to Sigillaria scutellata Brongt.* and to 

 Sigillaria mamillaris Brongt., t but from the former it differs in the leaf scars being 

 more distinctly hexagonal, a little larger and more closely placed to each other, and 

 from the latter in its larger leaf scars and the ornamentation of the cortex, which is 

 stronger and more evenly distributed in the form of a longitudinal band. 



The specimen figured by Dr Arber as Sigillaria trigona (I.e.) appears to belong 

 to Sigillaria Boblayi. In Sigillaria trigona Sternb. the ribs are flexuous and the 

 transverse furrows extend across the whole width of the rib, dividing it into com- 

 partments, and the concavity of the transverse bars also faces upwards. In Sigillaria 

 Boblayi, on the other hand, the transverse furrow only occupies the central \ or 

 f of the rib, and any slight concavity it may possess faces downwards. Sigillaria 

 trigona belongs, in fact, to the Favularia' section, while Sigillaria Boblayi is a 

 member of the Rhytidolepis section of Sigillaria. \ 



To Sigillaria Boblayi I would also refer the specimen ascribed to Sigillaria 

 mamillaris by Lesquereux in his Coal Flora, pi. lxxii, fig. 6. The leaf scars on this 

 example are typically those of Sigillaria Boblayi. 



Locality. — Kinlet Colliery, 1 mile S.W. of Highley, Shropshire. 



Horizon. — Shales associated with Brooch Seam. Westphalian Series. Collected 

 by Mr J. Pringle (Pr. 1480). 



Sigillaria Candollei Brongt. 

 PI. IV, figs. 1, la, 2, 2a. 



1836. Sigillaria Candollii, Brongt., Hist. d. ve'get. foss., p. 463, pi. cl, fig. 4. 



1857. „ „ Goldenberg, Flora Sarxp. foss., Heft ii, p. 44, pi. viii, fig. 11. 



1870. „ ,, Schiraper, Traite d. paleont. veget., vol. ii, p. 86. 



1890. Sigillaria Candollei, Grand'Eury, Geol. et paleont. du bassin houil. du Gard, p. 253, pi. x, fig. 7. 



Description. — Stem ribbed, ribs straight, convex. Leaf scars distant from each 

 other from lj to l\ times their own length, and occupying about \ to \ the width of 

 the rib, oval, about 1^ times as long as broad, narrowed towards upper end, rounded 

 below and above, lateral angles scarcely observable. 



Cicatricules three, and placed about § above base ; central punctiform, the lateral 

 elongate and slightly lunate. 



Immediately above the leaf scars is a ligule pit. Surface of rib ornamented by 

 a band of delicate sculpture which consists of a few stronger obliquely transverse 

 lines immediately below the leaf scar (fig. 2), sometimes very faintly indicated, or 

 even absent (fig. l), which speedily die out, and a few similar markings above the 



* Hist. d. vfyet. foss. , p. 533, pi. 1, figs. 2, 3 ; pi. clxiii, fig. 3. 



t Ibid., p. 451, pi. cxlix, fig. 1. 



I See Kidston, Trans. Roy. Soc. Edin., vol. 1, p. 140, pi. xii, figs. 2-4, 1914. 



