94 DR ROBERT KIDSTON ON THE 



and that the specimen which had been described as Carpolithus Nathorsti was in 

 all probability a fertile example of Zeilleria Schaumburg-Lippeana Stur, sp. # These 

 discoveries therefore make it extremely probable that the specimen of Zeilleria 

 Avoldensis given at text-fig. 2 represents the microsporangia-bearing plant, and that 

 shown at PI. VII. fig. 5 the seed plant. The larger size of the split cupule of fig. 5 

 cannot be regarded as merely a stronger development, and the central mammillate 

 protuberance can scarcely be explained otherwise than the point of attachment of a 

 small seed. 



The form of the pinnules bearing these larger and smaller fructifications is similar. 

 The specimens of Zeilleria Avoldensis, sp., figured here were collected by 

 Mr H. W. Hughes, who kindly placed them in my hands for description. 

 Horizon and Localities. — 



Blue Measures, six feet above Brooch Coal : Hamstead Colliery, Great Barr, 



near Birmingham. Collected by Mr H. Insley. 

 Roof of Brooch Coal : Shut End ; Tividale. 

 Ten-foot Ironstone Measures : Clayscroft Openwork, Coseley, near Dudley. 



Zeilleria delicatula Sternberg, sp. 



1823. Sphenopteris delicatula, Sternb., Essai flore monde prim., vol. i. fasc. ii. p. 34, pi. xxvi. fig. 5 ; 



fase. iv. p. 16. 

 1829. „ „ Brongt., Hist. d. veget. foss., p. 185 (?pl. lviii. fig. 4). 



] 848. ,, „ Sauveur, Veget. foss. terr. houil. de la Belgique, pi. xxiii. fig. 5. 



1899. ,, ,, Hofmann et Ryba, Leitpjianzen, p. 42 (? pi. iii. figs. 22, 22a). 



1884. Zeilleria delicatula, Kidston, Quart. Journ. Geol. Soc, vol. xl. p. 592, pi. xxv. figs. 1-12. 

 1888. ,, ,, Zeiller, Flore foss. bassin houil. de Valen., p. 57, fig. 37 a, b. 



1891. „ ,, Kidston, Trans. Geol. Soc. Glasgow, vol. ix. p. 33, pi. iii. fig. 34 a, b. 



1899. ,, ,, Potonie, Lehrb. d. PJlanzenpal., p. 103, fig. 90 in. 



1903. ,, „ Arber, Quart. Journ. Geol. Soc, vol. lix. p. 13, pi. ii. figs. 1, 2. 



Remarks. — Both sterile and fertile states of the plant have been collected — those 

 at Sandwell by Mr H. W. Hughes, and those at Hamstead by Mr Henry Insley. 



Horizon and Localities. — Blue Measures, above Brooch Coal : Jubilee Pit, Sandwell 

 Park, West Bromwich ; Hamstead Colliery, Great Barr, near Birmingham. 



Zeilleria sp. 



Remarks. — Mr H. W. Hughes has collected some fragments of an undescribed 

 species of Zeilleria at Sandwell ; but as I have better specimens of this plant from the 

 Yorkshire and Burnley Coal Fields, I shall defer its description until another time. 



Horizon and Locality. — Blue Measures, above Brooch Coal : Jubilee Pit, Sandwell 

 Park, West Bromwich. 



* See Nathorst, I.e., p. 10 ; and Zeiller, Comptes rendus, vol. cxliv. p. 1139, 1907. 



