_Sigillariostrobus Tieghemi_ Zeiller[512] (figs. 201, E, F). In this species, from the Coal-field of Valenciennes, the pedicel bore acicular leaves or bracts attached to the upper portion of leaf-cushions arranged in vertical series (fig. E). The cones reached a length of 16 cm. and a breadth of 2·5–5 cm.; the sporophylls are borne in alternating verticils with 8–10 in each whorl. Several megaspores (2 mm. in diameter) appear to have been produced in tetrads in each sporangium. [Illustration: FIG. 201. _Sigillariostrobus._ A, C. _Sigillariostrobus rhombibracteatus_ Kidst. (After Kidston.) A. Portion of strobilus. C. Megaspore. B, D. _Sigillariostrobus ciliatus_ Kidst. (After Kidston.) E, F. _Sigillariostrobus Tieghemi_ Zeill. (After Zeiller.)] _Sigillariostrobus rhombibracteatus_ Kidston[513]. Fig. 201, A, C. Kidston described this species from the Middle Coal-Measures of England: it is similar in habit and in the form of the sporophylls to _S. Tieghemi_, but rather smaller, and the more definitely rhomboidal sporophylls have a ciliate margin. The cone was probably heterosporous, but megaspores alone have so far been discovered. The sporophylls bear a close resemblance to those of _Lycopodium cernuum_ (fig. 126, C). In some of the illustrations of this type given by Kidston the naked cone-axis with its numerous sporophyll-scars is clearly shown, reminding one of the naked axes of the cones of the Silver Fir (_Abies pectinata_) or Cedar after the fall of the scales.