64 Dr. W. C. Williamson on 



PALiEOSTACHYA. Weiss. 



ASTEROPHYLLITES. Will VOLKMANNIA. Sternberg. 



CALAMITES. Brongniart and Lindley and Hutton. 



PAL^OSTACHYA PEDUNCULATA. Will 



See Weiss. " Abhandlungen Zur Geologischen Specialkarte von 

 Preussen und den Thuringischen Staaten." Band V., Heft. 2, p. 182. 



E.— p. 57-58, Fig. 32, C.N. 1060. 



PARACALAMOSTACHYS. Weiss. 



ASTEROPHYLLITES. Will 



PARACALAMOSTACHYS WILLIAMSONIANA. 



tVetss, ut supra p. 193. 



Stem. 



E.— p. 57, Fig. 44, C.N. 1058. 

 Strobilus. 



E.— p. 57, Fig. 31, see C.N. 1057. 



ASTEROPHYLLITES (in part). Brong 



ASTEROPHYLLITES SPHENOPHYLLOIDES. Will 



Axis. 



Vascular Bundle. Primary. Transverse. 



E. — p. 42, Fig. le, C.N. 871. p. 42, Fig. 2c. 



Secondary Exogenous Zones. Transverse. 



E.— p. 43, Fig. 2d, C.N. 872. Fig. 3d, Fig. 4, C.N. 871. p. 45, Fig. 9, 

 C.N. 891. Fig. 10, p. 46, Fig. II, C.N. 900. Fig. 12, C.N. 900. 



Tracheids. 



E.— p. 44, Fig. 6 ; see C.N. 893. 



Medullary Rays. 



E.— p. 46-7, Fig. 13, C.N. 891. 



Cortex. 



Transverse inner. 



p. 43, Fig. 4, C.N. 871. p. 45, Fig. 9, C.N. 891. p. 46, Fig. 10; 

 see C.N. 894. Fig. 16 g-h. 



Outer. 



E.— p. 4b, Fig. I, C.N. 871. p. 43, Fig. 2, C.N. 872. Fig. 4, C.N. 

 871. Fig. i6k", C.N. 874. 



Cortex. Longitudinal. 

 Inner. 



E.— p. 44, Fig. 5g-h, C.N. 871, Fig. 7. 

 Outer. 



E.— p. 44, Fig. 5k, C.N. 871, p. 45, Fig. 8. 



