It has been shown by Halle[181], who has re-examined several of Goldenberg’s specimens which have been acquired by the Stockholm Palaeobotanical Museum, that some of his species of _Lycopodites_ are heterosporous and therefore referable to Zeiller’s genus _Selaginellites_. In 1869 Renault described two species of supposed Palaeozoic Lycopods as _Lycopodium punctatum_ and _L. Renaultii_[182], the latter name having been suggested by Brongniart to whom specimens were submitted. These species were afterwards recognised by their author as wrongly named and were transferred to the genus _Heterangium_[183], a determination which is probably correct; it is at least certain that the use of the name _Lycopodium_ cannot be upheld. We have unfortunately to rely on specimens without petrified tissues for our information in regard to the history of _Lycopodites_ and _Selaginellites_. Among the older fossils referred to _Lycopodites_ are specimens from Lower Carboniferous rocks at Shap in Westmoreland which Kidston originally described as _Lycopodites Vanuxemi_[184], identifying them with Goeppert’s _Sigillaria Vanuxemi_[185] founded on German material. In a later paper Kidston transferred the British specimens of vegetative shoots to a new genus _Archaeosigillaria_[186]. _Lycopodites Stockii_ Kidston[187]. The plant so named was discovered in Lower Carboniferous strata of Eskdale, Dumfries, Scotland; it is represented by imperfectly preserved shoots bearing a terminal strobilus and was originally described by Kidston as apparently possessing two kinds of foliage leaves borne in whorls. The larger leaves have an ovate cordate lamina with an acuminate apex, while the smaller leaves, which are less distinct, are transversely elongated, and simulate sporangia in appearance. Dr Kidston’s figure of this species has recently been reproduced by Professor Bower[188] who speaks of the supposed smaller leaves as sporangia, a view with which the author of the species agrees. It would appear that this identification is, however, based solely on external resemblance and has not been confirmed by the discovery of any spores. Assuming the sporangial nature of these structures, this Palaeozoic type represents, as Bower points out, a condition similar to that in some recent species of _Lycopodium_ in which sporangia are not confined to a terminal strobilus but occur also in association with ordinary foliage leaves. The strobilus consists of crowded sporophylls which are too imperfect to afford any definite evidence as to their homosporous or heterosporous nature. As Solms-Laubach[189] points out, this type recalls _Lycopodium Phlegmaria_ among recent species. _Lycopodites Reidii_ Penhallow.