272 SCIENCE PROGRESS. 



(40) Renault. Conrs de Botaniquc fossile, 1 881- 1885. 



(41) BlNNEY. Observations on the Structure of Fossil Plants 



found in the Carboniferous Strata. Palceontographical 

 Society, 1868- 1875. 



(42) CARRUTHERS. On the Structure of the Fruit of Calamites. 



Seanans Journal of Botany, vol. v., 1867. 



(43) SEWARD. A Type of Pakeozoic Plants. Science Progress, 



July, 1895. 



(44) SOLMS-LAUBACH. Fossil Botany. Eng. Trans., 1892. 



(45) SOLMS-LAUBACH. Bowmanites Romeri. Jahrbuch der K. K. 



Gcol. Anstalt, Vienna, 1895. 



(46) ZEILLER. Etude sur la constitution de l'appareil fructificateur 



des Sphenophyllum. Mem. de la Soc. Geol. de France; 

 Paleontologie, mem. 11, 1893. 



(47) ZEILLER. Cones de fructification des Sigillaires. Ann. des 



Sci. Nat. (Bot.) ser. 6, vol. xix., 1884. 



(48) GRAND 'Eury. Geol. et Palcontol. du Bassin Houiller du 



Gard, livre in., 1890. 

 The above list includes all Williamson's more important 

 memoirs on the Carboniferous plants. As regards other authors 

 only a few of the works more directly referred to are cited. 



D. H. Scott. 



