Wieland[613] recently discovered Cordaitean leaves exhibiting a wide range in size and shape in the Mixteca flora of Mexico in the lower members of a series which extends from the ‘upper borders of the Rhaetic’ through the Liassic to the lower beds of the Inferior Oolite. These leaves are referred to _Noeggerathiopsis Hislopi_, and it is clear from an examination of photographs received from Dr Wieland, one of which is reproduced in fig. 470, that the Mexican _Cordaites_ cannot be specifically distinguished from Bunbury’s type as represented by specimens described from India, South Africa, Siberia, Tonkin, and elsewhere. The occurrence of _Noeggerathiopsis_ is also recorded by Newberry from the Rhaetic series of Honduras[614]. _Noeggerathiopsis._ This genus was founded by Feistmantel[615] for some leaves from Lower Gondwana rocks in India originally described by Bunbury[616] as _Noeggerathia (Cyclopteris?) Hislopi_ (figs. 470–472) and regarded by him as probably Cycadean. Several authors have added to our knowledge of this widely spread southern type and in many localities the leaves occur in association with platyspermic seeds of the _Samaropsis_ or _Cordaicarpus_ type, pieces of stems with Cordaitean leaf-scars, and petrified wood agreeing in the structure of the secondary xylem with that of European species of _Cordaites_. In some Permo-Carboniferous sandstones at Vereeniging, South Africa, stumps and spreading roots (fig. 478) resembling those described from France by Grand’Eury (cf. fig. 468, A) have also been discovered. A remarkable occurrence of roots and prostrate stems of some forest-tree was recorded some years ago in the bed of the Vaal river near Vereeniging where the surface of a seam of coal was exposed over an area of more than two acres[617]. Large branched roots (fig. 478) spreading over the coal for a distance of several feet and thick stems 40–50 ft in length with very few branches and but little decrease in diameter afford a striking picture of a forest-floor. The frequent occurrence of _Cordaites (Noeggerathiopsis) Hislopi_ in the associated strata suggests a reference of the stems and roots to that species. Moreover the structure of the secondary xylem of some petrified pieces of stem sent to me by Mr Leslie from Vereeniging agrees closely with that of a European Cordaitean stem. [Illustration: Fig. 470. _Cordaites (Noeggerathiopsis) Hislopi_. From Mexico. (After Wieland; ⅚ nat. size.)] [Illustration: Fig. 471. _Cordaites (Noeggerathiopsis) Hislopi_. From Vereeniging. (A, _ca_, ⅕ nat. size; B, _ca_, ⅙ nat. size.)] [Illustration: Fig. 472. _Cordaites (Noeggerathiopsis) Hislopi_. From India. (Calcutta Museum; ⅔ nat. size.)]