716 DR R. KIDSTON. 



three descending lines of ornamentation are clearly seen. The basal margins of the 

 leaf scars are always, on this example, prominently pointed. The leaf scars are also 

 longer than broad. 



At fig. 4 another small specimen is given where the inflation of the ribs is very 

 marked, so much so that they form hexagonal areas whose bases being pressed 

 against and over the upper margins of the leaf scars below, give a very Lepidophloid 

 appearance to the specimen, somewhat similar to the Lepidophloios tumidus Bunbury, 

 sp.* The leaf scars on this example are also transversely extended and become 

 broader than long ; they are, however, of the same general structure as those on the 

 other specimens, having prominent lateral angles and notched upper margin with 

 pointed base. The ornamentation of the interfoliar area is also identical. The 

 slight differences in the form of the interfoliar areas and the leaf scars seem to be the 

 result of a lateral extension of the ribs. 



Another example of this species is illustrated at fig. 5, PI. I, and a portion enlarged 

 two times at fig. la. Here the leaf scars are separated by about three times their 

 length. The furrows, though still distinctly undulated, are not so much so as in 

 the specimens already described. The leaf scars possess the same characters, 

 especially as those seen on figs. 2 and 3. They are notched on the upper margin and 

 pointed at base, with prominent lateral angles, and on the cortex immediately above 

 the leaf scar is the same plume-like marking, but the ornamentation on the interfoliar 

 portion of the rib assumes more the form of a central band. Notwithstanding this 

 difference, I have no hesitation in referring this example to the same species as 

 figs. 1-4. 



The nearest allies to Sigillaria Strivelensis are Sigillaria contracta Brongt.t 

 Sigillaria Feistmanteli Gemitz,} and Sigillaria polyploca Boulay.§ On the first 

 two mentioned the leaf scars are pyriform, which at once distinguish them from 

 Sigillaria Strivelensis, and further, the ornamentation of the interfoliar cortex in 

 S. contracta is punctiform and covers the whole of the contracted portion of the rib, 

 as seen on the type which is now preserved in the British Museum, and not in 

 the form of a series of lines descending from a central ridge as given by Brongniart. 

 Such specimens, however, as those given on PI. I, figs. 3 and 4, have a resemblance 

 to Sigillaria polyploca Boulay, but they differ in the form of the ornamentation of the 

 cortex, and the ridges which descend from the lateral angles are shorter and less 

 prominent, and there is never any transverse furrow above the leaf scars in our 

 species. 1 1 The plumose-like ornamentation above the leaf scars is also absent in 

 Sigillaria polyploca Boulay. 



* Lepidodendron ? tumidum, Banbury, Quart. Journ. Geol. Soc, vol. iii, p. 432, pi. xxiv, fig. 1, 1847. 



f Hist. d. vege't. foss., p. 459, pi. cxlvii, fig. 2. 



X Neues Jahrb., 1865, p. 392, pi. iii, figs. 4 and 4a ; Feistmantel, Vers. d. bohm. Kohl-Ablag., Abth. iii, p. 14, 

 pi iii, figs. 4, 46,5, 5a, 1876. 



$ Le terr. houil. da Nord de la France, p. 47, pi. ii, fig. 8, Lille, 1876 ; Zeiller, Flore foss. bassi7i houil. d. Valen., 

 p. 540, pi. lxxxii, figs. 7, 8, 1886. 



|| Cf. figs. 1, 2, and 5. 



