_Samaropsis fluitans_ (Dawson). The species described by Dawson[984] as _Cardiocarpum fluitans_ from Carboniferous strata in Nova Scotia, is represented by oval seeds with a fairly broad border usually showing an apical notch. Fig. 502, A, is a copy of Dawson’s figure: the apparent absence of an apical sinus in the ‘wing’ is probably due either to an error in interpretation or to some imperfection in the specimen. As fig. 502, A, shows, the type-specimens are far from satisfactory, and it may be that they are not specifically identical with the more complete specimens from European strata referred to Dawson’s species. Zeiller[985] points out that seeds of this species vary considerably in size, but there is always in well-preserved examples a bifid beak at the apex. Seeds of similar form though not specifically identical are described from the Coal Measures of Missouri as _Cardiocarpon (Samaropsis) Branneri_ Fairch. and White[986]. Good examples of _S. fluitans_ are figured by Weiss[987] from the Coal Measures of Saarbrücken and the species is widely distributed in Upper Carboniferous beds generally. _Samaropsis bicaudata_ Kidston. This species (fig. 502, E) originally described[988] from Lower Carboniferous rocks in Scotland as _Cardiocarpus bicaudata_ and subsequently assigned to _Samaropsis_, is characterised by a greater development of the flat wing-like border which is divided into two long tapering basal lobes. Seeds of similar form are figured by Lesquereux[989] from Pennsylvania as _Cardiocarpus_ (_Ptilocarpus_) _bicornutus_. _Samaropsis_ (_Samarospermum_) _moravica_ (Helmhacher). This type[990] (fig. 502, H) is characterised by the great length of the wing-like border and on that account it was transferred by Arber to a new genus. It was originally described by Helmhacher from the Permian of Moravia as _Jordania moravica_ and the type-specimen has been refigured by Zeiller[991] who records the species from Upper Carboniferous and Permian rocks in France: it is recorded also from several localities in Germany[992]. Seeds figured by Potonié[993] from the Permian of Thuringia as _Samaropsis Crampii_ (Hartt) are undoubtedly examples of _S. moravica_: the true _S. Crampii_ has recently been well illustrated by Dr Stopes[994] from the Westphalian of New Brunswick. The species is recorded by Arber[995] from the Kent coalfield. _Samaropsis emarginata_ (Goeppert and Barger).