Cu. XXIV.] CONIFERS OF THE COAL PERIOD. 



369 



Fig. 4S4. FragmeBt of coniferous vrood, Dadoxylon, 

 Endlicher, fractured loneitudinallv; from Coal- 

 brook Dale. W. C. Williamson.* 



a. Bark. 



h. Woody zone or fibre (pleurenchyma). 



c. Medulla or pith. 



d. Cast of hollow pith, or " Sternbergia." 



"^-•ft^^S*^ 



Magnified portion of fig. 484; transverse section. 

 c. Pith. &, &. Woody fibre. ^, e. Medullary rays. 



In the above specimen the structure of the wood (&, figs. 484 and 

 485) is coniferous, and the fossil is referable to Endlicher's fossil genus 

 Dadoxylon. 



The fossil named Trigonocari^on (figs. 488 and 48*7), formerly supposed 



Fig. 487. 



Fiji 486. 



Trigonocarpum ovatum, Lindley & Hutton. 

 Peel Quarry, Lancashire. 



Trigonocarpum olivaforme^ Lindley, 

 ■with its fleshy envelope. Felling 

 Colliery, Newcastle. 



to be the fruit of a palm, may now, according to Dr. Hooker, be referred, 

 like the Sternbergia, to the Conifer ce. Its geological importance is great, 

 for so abundant is it in the Coal Measures, that in certain localities the 

 fruit of some species may be procured by the bushel ; nor is there any 

 Dart of the formation where they do not occur, except the uuderclays and 



* Manchester Philos. Mem. vol. ix. 1851. 

 24 



