The seed represented in fig. 502, B, from the Lower Coal Measures of Kilmarnock, Scotland[996], affords a good example of the genus: the species was originally described by Berger as _Cardiocarpon emarginatum_ and it was on this type that Fiedler founded the genus _Cyclocarpon_[997]. It has been referred by many authors to _Cardiocarpon_ and might be regarded as a type intermediate between _Cordaicarpus_, as used in this chapter, and _Samaropsis_, though the breadth of the border is more in keeping with the latter designation. The figured specimen is 1·6 cm. long and 1·4 cm. broad; the nucule has a slightly cordate base and shows several faint converging ribs which are too inconspicuous to be represented in a natural-size drawing. A narrow median groove in the apical region shows the position of a vascular strand. The species is recorded from several countries: similar though specifically distinct seeds, described by Dawson as _Cardiocarpon cornutum_, have recently been re-described by Dr Stopes[998] from the Westphalian of New Brunswick where they occur in association with the leaves of _Cordaites Robbii_ Daws. [Illustration: Fig. 502. A, _Samaropsis fluitans_. B, _Samaropsis emarginata_. C, D, _Cordaicarpus Cordai_. E, _Samaropsis bicaudata_. F, _Samaropsis Seixasi_. G, _Samaropsis barcellosa_. H, _Samaropsis moravica_. I, _Samaropsis bignonioides_. K, _Samaropsis Newberryi_. (A, after Dawson; B, R. K. 1576; C, R. K. 1899; D, R. K. 4647; E, after Kidston; F, G, after White; H, after Zeiller; I, after Fiedler; K, R. K. 2313. All nat. size.)] _Samaropsis Newberryi_ Andrews. This species was originally described by Andrews[999] from the Coal Measures of Ohio: the specimen shown in fig. 502, K, was sent to Dr Kidston by Mr Claypole. The whole seed is 5 cm. wide and 3·5 cm. in depth; it is characterised by a short and relatively broad nucule surrounded by a very broad and flat border showing faintly marked radially disposed lines and in places some irregularly distributed pits. The apex is emarginate and there is a broad and deep sinus in the sarcotesta in the chalazal region. The seed resembles _Samaropsis alata_ Kidst.[1000] and _S. Baileyi_ (Daws.)[1001] but it differs from these in the greater breadth of the ‘wing’ and in the form of the nucule. The seed described by Fiedler[1002] as _Jordania bignonioides_ (fig. 502, I) agrees closely with _S. alata_ Kidst. but is probably specifically distinct. _Samaropsis barcellosa_ (White).