This generic name was given by Renault[838] to some small petrified seeds from the Stephanian of Grand’ Croix and to impressions from the Commentry coal-field which he believed to belong to some Gnetaceous plant. Saporta and Marion[839] and other authors have accepted these seeds as evidence of the existence of Palaeozoic Gnetales: it has, however, been shown[840] that _Gnetopsis_ has no claim to such relationship and is a type of seed closely allied to _Conostoma_. Renault described three species, afterwards adding three from another locality[841]; the genus is recorded also from Commentry[842] and Gard[843]. More recently Depape and Carpentier[844] have described examples from the Westphalian of Valenciennes which they place in the Pteridosperms in accordance with the conclusion of Oliver and Salisbury. _Gnetopsis_ has also been discovered by Mr Hemingway in the Middle Coal Measures of England[845] (fig. 494, H). _Gnetopsis elliptica_ Renault. The seeds of this species, slightly oval in section, occur in groups of 2–4 in a cupular investment (fig. 506, E, p. 359) described by Renault as an ovary but correlated by Oliver and Salisbury with the cupule which surrounds the single ovule of _Lagenostoma_. The cupule is lined with hairs similar to those on the wall of the cupule of _Lagenostoma_. A characteristic feature of the French seeds is the presence of three or four long plumes of hairs at the apex (fig. 494, E, F). As seen in fig. 494, E, a small lagenostome (pollen-chamber) rests on the roof of a broad plinth precisely as in _Conostoma_, and four vascular bundles, corresponding to the six bundles in _Conostoma_, pass into the apical cap of sclerous tissue enclosed by a sarcotesta, _sa_ (fig. 494, E, G). A ‘tent-pole’ prolongation (fig. 494, E, _t_) occurs at the apex of the prothallus. Renault described a portion of the integument as consisting of lacunar tissue which Oliver and Salisbury homologise with the superficial mucilaginous layer of _Conostoma_: this is seen above the sclerotesta in the apical region of fig. 494, E, _sa_. _Gnetopsis anglica_ Kidston +MS.+ This species (fig. 494, H) is represented by seeds from the Middle Coal Measures near Barnsley, Yorkshire, 4 mm. long with apical appendages at least 2·2 cm. in length and probably four in number. The appendages do not show the hairs which form a prominent feature in the French specimens, but this is probably the result of imperfect preservation: there are indications of hairs on other specimens in Dr Kidston’s Collection. The type-specimen, in Dr Kidston’s Collection, was generously lent to me for examination.