PLANTS. 3 



Genus Polysiphonia, Greville. 



Diagnosis. — "Filaments partially or generally articulate, longitudinally striated 

 with internal parallel tubes. Fruit double. 1 ovate capsule furnished with a 

 terminal spore ; 2 granules immersed in distorted ramuli."^ 



The inarticulate Fucus fmcticulosus, Wulf., common on the south coasts of England 

 and Ireland, is the type of this genus. 



Polysiphonia (?) Sternbergiana, King. Plate I, Fig. 2. 



CoNFERViTES (?), King. Catalogue, p. 5, 1848. 

 This is a Conferva-like plant, with numerous filiform branches, proceeding from 

 a slender stem. 



The only specimen apparently known was found in the Marl-slate of Thickley. 



Genus Caulerpa, Lamouroux. 



Diagnosis. — " Frons viridis, membranacea, plana vel cylindracea, stipitata, surculo 

 repente cartilagineo radicante instructa. Fructus .... (?)"^ 



M. Adolphe Brongniart, speaking of the fossil next to be described, and other three 

 species found in the Kupferschiefer of Thuringia, states that "they appear to be 

 related to the genus Caulerpa."^ Perhaps it would not be going too far to suggest 

 that they may belong to the fourth section of the genus characterised as having 

 " ramulis undique imbricatis, linearibus vel setaceis." (?) 



Caulerpa (?) selaginoides, Sternberg. Plate I, fig. 3. 



Catjlerpites selaginoides, Sternberg. Versuch. p. 20, 1821. 



— lycopodoides „ Idem. 



Fucoides lycopodoides, Sternberg. Brongniart, Veg. Foss. p. 73, pi. 9, fig. 3, 1828. 

 — selaginoides „ ,, Idem, p. 73, pi. 9, fig. 2, 1828. 



(?) One of the "Two species of Ferns," cited by Sedgwick. Trans. Geol. Soc. Lond. 



2d series, vol. iii, p. 120, 1829. 

 VoLTZiA Phillipsii, LindUy and Hutton. Fossil Flora, vol. iii, pi. 195, 1836. 

 (?) Pinna (?) prisca, Munster. Beitriige, p. 45, pi. 4, fig. 4, 1839; and p. 66, pi. 4, 



fig. 4, 1843. 

 (?) SoLEN, Geinitz. Grundriss, p. 450, 1846. 



Fucoides (Caulerpa ?) lycopodoides, Brong. King, Catalogue, p. 5, 1848. 

 VoLTZiA, Howse. T. F. N. C. vol. i, p. 264, 1848. 

 (?) Solen (?) PiNN^FORMis, Geinitz. Versteinerungen, p. 8, 1848. 



Caulerpites selaginoides, Sternb. Geinitz, Verst. p. 21, pi. 8, figs. 9, 10, 1848. 



1 Smith, The English Flora, vol. v, p. 327, 1833. 



2 Greville, Algae Britannicse, Synopsis, p. Ixiii. 

 '^ Histoire des Vegetaux Fossiles, p, 43, 1828. 



