^4 YORKSHIRE NATURALISTS' UNION. 



Remarks. — Some authors (Schimper and Weiss) 

 unite the cones figured by I.udwig* with this species. In 

 fact, Schimper gives as the types of his Calaviostachys typica 

 the figures of Ettingshausen (I.e.) and those of Ludwig. I 

 am not aware that in any of the specimens I have given as 

 references and synonyms to Calamostachys typica has the 

 structure or mode of attachment of the sporangia been 

 observed. Hence I do not see on what grounds the 

 originals of the figures I quote as references to Cala- 

 mostachys typica can be associated with the specimens 

 figured by Ludwig, whose specific characters are derived 

 from internal organization and to whose plant Mr. 

 Carruthers has given the name of Volkmannia {Cala- 

 mostachys) liidwigi.j The specimens on which the York- 

 shire record is made are merely impressions similar to those 

 figured by Ettingshausen and the other authors noted 

 above. 



PAL^OSTACHYA Weiss. 

 Palaeostachya pedunculata Williamson. 



Palceostachya pedunculata Williamson in Weiss, Steinkohlen 

 Calmarien, vol. ii, p. 182, pi. xx, fig. 7 ; pi. xxi, figs. 

 3, 4. Zeiller, Flore foss. d. bassin houil. d. Valenciennes 

 p. 382, pi. Ix, figs. I, 2. Binney, Palaeont. Soc, vol. xxi, 

 p. 29, pi. vi, figs. 4 and 4 a. 

 Fruit of Asterophyllites, Williamson, Phil. Trans., clxxiv, pp. 



57 and 79, pi. V, fig. 32. 

 Middle Coal Measures. 



Hor. — Barnsley Thick Coal. Loc. — East Gawber Colliery, 

 near Barnsley (Hemingway). 

 Palaeostachya gracillima Weiss. 



Palceostachya gracillifiia Weiss, Steinkohl.-Calam., part ii, p. 

 184, pi. xviii, fig. I, 1884. Kidston, Trans. Geol. Soc. 

 Glasgow, vol. viii, p. 54, pi. iii, fig. 3. 



"^ Calamiten-Friichte aus dem Spatheisenstein bei Huttigen an der Ruhr. Palaeonto- 



graphica, vol. x, p. ii, pi. ii. 

 t Journal of Botany, vol. v, 1867, p. 340. 



Geol. Trans. Y.N.U., iSSS (pub. 1S90). 



