The generic name _Scuto-Cordaites_ was proposed by Renault[604] for a specimen from Commentry consisting of a flattened branch bearing a few imperfectly preserved leaves. The surface of the branch shows semicircular leaf-scars on decurrent, spirally disposed leaf-cushions and bears a certain resemblance to a slender stem of a Clathrarian _Sigillaria_. The leaves of the type-specimen of _Scuto-Cordaites Grand’Euryi_ appear to be broadly linear, 13 cm. long, the breadth gradually increasing from the base: a short distance from the proximal end the lamina is broken up into narrow segments; the veins are ·5 mm. apart with finer striations between them. Some specimens from Pennsylvania made by Dawson[605] the type of a new sub-genus and named _Dictyo-Cordaites Lecoi_ agree in shape and arrangement with some species of _Cordaites_, but differ in an occasional anastomosis of the veins as in _Psygmophyllum flabellatum_. It is, however, impossible to determine the true nature of the fossils from the published figures. +Cordaitean leaves from India, the Southern Hemisphere, and Siberia. _Noeggerathiopsis_, Feistmantel; _Rhiptozamites_, Schmalhausen; _Euryphyllum_, Feistmantel.+ {_Cordaites aequalis_ Goeppert. {_Cordaites_ (_Noeggerathiopsis_) _Hislopi_ (Bunbury). In 1845 Goeppert[606] instituted the species _Noeggerathia aequalis_ (fig. 469) and _N. distans_ for incomplete broadly linear and obovate leaves, from Siberian Permian strata, having a contracted base and equal parallel veins. The specimens so named are no doubt specifically identical. Goeppert’s species _N. aequalis_ has recently been carefully investigated by Zalessky[607] who agrees with Kosmovsky[608] in identifying it with _Noeggerathiopsis Hislopi_ (Bunb.) and _Rhiptozamites Goepperti_ Schmal. Schmalhausen[609] had previously pointed out the probable identity of his species with _Noeggerathia palmaeformis_ Goepp. (= _Cordaites_). The question of specific identity of these leaves from different localities and of other hardly distinguishable forms is of secondary importance; the main point is that they are all examples of Cordaitean leaves, _Cordaites_ or some allied genus, and point to the existence of this group of Gymnosperms during Permo-Carboniferous times in Siberia, China, India, Australia, South Africa, and S. America, also in the Rhaetic floras of Tonkin[610] and Mexico[611]. The fragments from Devonian strata at Iguana Creek, Australia, named by McCoy[612] _Cordaites australis_ are probably pieces of the rachis of some large frond. [Illustration: Fig. 469. A–C, E, _Cordaites aequalis_; D, _Cordaites Clerci_. (After Zalessky; ⅚ nat. size.)]