There is another species of _Equisetites_, _E. Münsteri_, Schk., from a lower geological horizon which has been compared with _E. lateralis_, and lends support to the view that the so-called branch-scars are nodal diaphragms[534]. This species also affords additional evidence in favour of retaining the generic name _Equisetites_ for Phillips’ species. _Equisetites Münsteri_ is a typical Rhaetic plant; it has been found at Beyreuth and Kuhnbach, as well as in Switzerland, Hungary and elsewhere. A specimen of _Equisetites_ originally described by Buckman as _E. Brodii_[535], from the Lower Lias of Worcestershire, may possibly be identical with _E. Münsteri_. The leaf-sheaths of this Rhaetic species consist of broad segments prolonged into acuminate teeth; some of the examples figured by Schenk[536] show clearly marked impressions of displaced nodal diaphragms exactly as in _E. lateralis_. Another form, _Equisetum rotiferum_ described by Tenison-Woods[537] from Australia, is closely allied to, or possibly identical with _E. lateralis_. [Illustration: FIG. 64. _Equisetites lateralis_ Phill. A. Part of a stem showing leaf-sheaths and an imperfect diaphragm. B. A single flattened leaf-sheath. C. A detached nodal diaphragm. From a specimen in the York Museum. Slightly reduced.] 8. _Equisetites Burchardti_ Dunker[538]. Fig. 65. This species of _Equisetites_ is fairly common in the Wealden beds of the Sussex coast near Hastings, and also in Westphalia. [Illustration: FIG. 65. _Equisetites Burchardti_ Dunk. Showing a node with two tubers and a root. From a specimen in the British Museum. Nat. size.] It is characterised by having long and slender internodes, bearing at the nodes leaf-sheaths with five or six pointed segments, and by the frequent formation of branch-tubers. These tuberous branches closely resemble those which are formed on the underground shoots of _Equisetum arvense_ L., _E. sylvaticum_ L. and others; they occur either singly or in chains[539]. In the specimen shown in the figure the left-hand tuber is remarkably well preserved, its surface is somewhat sunk and shrivelled, and the apex is surrounded by a nodal leaf-sheath. A thin branched root is given off just below the point of insertion of the oval tuber. No other species of _Equisetites_ affords such numerous examples of tubers as this Wealden plant. By some of the earlier writers the detached tubers of _E. Burchardti_ were described as fossil seeds under the name _Carpolithus_. [Illustration: FIG. 66. _Equisetites Yokoyamae_ Sew. From specimens in the British Museum. Nat. size.]