Brongniart[905] instituted this genus[906] on an incomplete transverse section of a seed from Grand’ Croix, 8 mm. in diameter, which he called _Eriotesta velutina_, characterised by a ribbed and probably octagonal testa bearing numerous elongated hairs over the whole surface. The material is, however, too meagre to throw any light on the important features of the seed. =Gaudrya.= Grand’Eury. _Gaudrya trivalvis_ Grand’Eury. The generic name _Gaudrya_[907] was proposed for two petrified seeds from the Gard coal-field briefly described as _G. trivalvis_, the type-species, and _G. lagenaria_. The testa of the former species shows signs of splitting along three equidistant lines; it consists of a sarcotesta enclosing an endotesta with six longitudinal ribs: Grand’Eury speaks of lacunae between the endotesta and nucellus which he regards as spaces in a tissue which made the seed buoyant and facilitated dispersal by water. It is not clear whether the nucellus and integument were originally connected or laterally free: the lacunae may be the remains of an inner flesh and not spaces in a spongy tissue. The genus is radiospermic and characterised by a long micropyle and a broad pollen-chamber. On the available evidence it is difficult to assign the specimens to their systematic position, but the genus is probably a member of the Trigonocarpales. III. +Cardiocarpales.+ Platyspermic seeds for the most part belonging to Cordaitalean plants and agreeing in their plan of organisation, even more closely than the seeds of the Trigonocarpales, with those of recent Cycads. The nucellus is free laterally from the integument and there is a series of vascular bundles in the nucellus. The testa consists of an outer flesh, the sarcotesta, which may reach a considerable thickness, a shell or sclerotesta, and in some genera an endotesta. In seeds preserved as impressions the sarcotesta often gives them a winged appearance (_Samaropsis_). The pollen-chamber is relatively small, resembling in this respect the chamber in recent Cycads. A central prolongation of the prothallus-tissue in the form of a blunt column or ‘tent-pole’ is a characteristic feature; the same feature occurs in seeds of the Lagenostomales, but in the Cordaitales it resembles more nearly the ‘tent-pole,’ as it was called by Hirase, in recent Cycadean seeds and in _Ginkgo_. The presence of two vascular strands in the sarcotesta in the principal plane of the seeds is a character shared with the seeds of _Cycas_: the position and course of these bundles are useful characters for distinguishing different types within the group. The microspores are multicellular.