V °l L 889. 11 '] PROCEEDINGS OF THE NATIONAL MUSEUM. 611 



10. Dadoxylon antiquius Dn. 



Dawson, Can. Nat., Vol. vm, 1863, p. 433 ; Quart. Jour. Geol. Soc. Loud., Vol. 

 xxn, 1866, p. 146. PI. v, figs. 1-3. 



Wood cells narrow, thick- walled, provided with two to three rows of 

 pores ; medullary rays of three to four series of cells, with twenty or 

 more superimposed, nearly as wide as the wood cells ; rings of growth 

 visible. (Dawson.) 



Coal measures, Hortou. 



Dadoxylon Schrollianum Gopp. Sp. 



Araucarites Schrollianus Goppert. Jahrb. d. Geol. Reichsanstalt. Wien, 1857, 

 p. 7; Foss. Fl. d. Perm. Form., p. 248. 



Concentric circles evident, one-quarter to two liues broad ; trache'ids 

 ample, moderately thin-walled, the pores in a single contiguous series; 

 medullary rays small, in a siugle or rarely in two series of from one to 

 fifty superimposed cells. (Goppert.) 



Permian formation (Gres rouge), Bohemia, Silesia, Chemnitz in 

 Saxony, Thuriugia, etc. 



12. Dadoxylon stigmolithos Endl. 



Endlicher, Syn. Conif., p. 300. 

 Araucarites stigmolithos Goppert, in Index. Paleont., Vol. i, p .120; Foss. Fl. d. 

 Perm. Form., p. 249; Gopp. in Mougeot, Essai d'une Fl. d. Nouv. Gres 

 Rouge, p. 28, PI. in, figs. 6, 7. 



Concentric rings obsolete ; tracheitis broad, thin-walled, provided 

 with one to three series of small, strictly contiguous pores ; medullary 

 rays simple, of one to twenty superimposed cells. (Goppert.) 



Permian formation, Bohemia, Saxony, and Frankreichof Val d'Ajol. 



13. Dadoxylon stellare Ung. 



Unger, Gen. et Spec. PI. Foss., p. 380. 



Araucarites steUaris Goppert, Foss. Fl. d. Perm. Form., p. 250. 



The medulla large, stellate in outline ; rings obsolete or 5 to 8 mm 

 broad ; trache'ids equal, narrow, thick-walled, provided with a single 

 row of small, contiguous pores ; medullary rays simple, of two to 

 thirty-three superimposed cells. (Unger.) 



Permian formation, Chemnitz in Saxony. 



14. Dadoxylon Valdejolense Moug. Sp. 



Araucarites ValdejoJensis Mougeot, Essai d'une Fl. d. Nouv. Gres Rouge, p. 27, 

 PI. in, figs. 1-7 ; Goppert, Foss. Fl. d. Perm. Form., p. 250. 



The medulla large, round (?) in outline : rings distinct ; trache'ids 

 equal, provided with two, rarely three, rows of small, contiguous pores ; 

 medullary rays numerous, simple, composed of one to twenty super- 

 imposed cells. (Goppert.) 



Permian formation, Val d'Ajol. 



