Palaeontologie. 43 



Thomas, H. H„ The Jurassic Plants Beds ofRoseberry 

 Topping. (Yorkshire Naturalist. N". 676. p. 198—200. 1913.) 



A provisional list is given of about 25 species from the Rose- 

 berry series, Yorkshire, and several of these are of a Liassic 

 character. Thinfeldia rhomhoidalis, Ell,, occurs in thick beds con- 

 sisting almost entirely of the cuticles of this plant, and resembling 

 the paper-coal of Russia. W. N. Edwards. 



Thomas, H. H. and N. Bancroft. On the Cuticles of some 

 Recent and Fossil Cycadean Fronds. (Trans. Linn. Soc. 

 Lond. VIII. p. 155-204. pl. 17—20. 32 textfig. 1913.) 



The method of enquiry adopted in the present paper is, first, 

 the detailed investigation of the epidermal structures found in the 

 modern Cycads,, and the attempt to discover a type of stomatal 

 structure characteristic of the group. The forms examined include 

 all the living genera except Microcycas. Secondly, the epidermal 

 structures of all the available Mesozoic fronds are described, and 

 an attempt is made to estimate their relations in this respect to 

 one another and to the modern fronds. 



As regards the fossil cuticles the conclusion is reached that 

 the Cvra^-like fronds from the Jurassic rocks of Yorkshire fall 

 into two sharpiy divided series, according to their epidermal struc- 

 ture. These groups differ from one another in the form of the 

 epidermal cells, the thickness of the cuticle, the position and arran- 

 gement of the storaata, the thickening of the guard-cells and the 

 nature of the subsidiary cells. The first group includes Ptilophyllunii 

 OtosamiteSj Dictyosavnites , Zatnites, Taeniopteris and Anoniosamites. 

 There are thus strong grounds for regarding this type of cuticular 

 structure as characteristic of the fronds of the Bennettitales. The 

 second group includes Nilssonia, Ctenis and Ptüosamites, and for 

 these fronds the authors propose to institute the new name Nilsso- 

 niales. The Nüssoniales seem somewhat closely allied to the modern 

 fronds, and may probably be regarded as the true mesozoic Cycads 

 and the ancestors of the modern forms. 



Agnes Arber (Cambridge). 



Travis, C. B. and W. G. On Plant-Remains in the Post- 

 Glacial Gravels at Seaforth, Liverpool. (Lanc. Nat. VI. 

 62. p. 49-51. 1913.) 



The deposit yielded 6 species of mosses, 3 liverworts and 2 

 flowering plants. All of them, with the exception of one of the 

 mosses, still occur in the district. W. N. Edwards. 



Vernon, R. D,, On the geology and palaeontologyof 

 the Warwickshire Coalfield. (Quart. Journ. Geol. Soc. 

 LXVIII. p. 587-638. pl. 57—61. 1912.) 



In the palaeobotanical portion of this paper the author gives 

 a list of 86 plants, including varieties, from the Carboniferous beds 

 of the Warwickshire Coalfield, with notes on some of the species. 

 Further tables give the distribution of these plants in the various 

 divisions of the Upper Carboniferous, showing that all the Produc- 

 tive Measures of Warwickshire are of middle Coal Measure age. 



