V0 1889 U '] PROCEEDINGS OF THE NATIONAL MUSEUM. 607 



3. Cordaites Newberryi Dn. Sp. 



Dadoxylon Neivbtrryi Dawson. Foss. PI. Devonian and Upper Silurian Forma- 

 tions of Canada, 1871, p. 14, PI. I, figs. 7-9 ; Newberry, Devonian plants from 

 Ohio, Jouru. Cincin. Soc. Nat. Hist., Vol. xn, 1889, p. 53, PI. vi, figs. 3, 

 3a, 3&. 



Cells more slender than in the last species ; areoles in two or three 

 rows with large oblique pores ; medullary rays very numerous, of about 

 eighteen rows of narrow cells in two series. (Dawson.) 



Hamilton group, Ohio. 



4. Cordaites Clarkii Dn. Sp. 



Dadoxylon Clarkii Dawson. Foss. PI. Erian (Devonian) and Upper Silurian 

 Formation of Canada, 1882, p. 125. 



Wood cells provided with two to three rows of slit-form bordered 

 pores in hexagonal borders ; medullary sheath of pseudo-scalaiiform 

 and reticulated fibers ; medullary rays numerous, short, and simple, 

 with sometimes as few as four cells superimposed. (Dawson.) 



Genesee shale, Cauandaigua Lake, New York. 



5. Cordaites Brandlingii (Lindl. & Hutt.) Gopp. 



Goppert Nachtriige z. Kenntniss d. coniferenbolzer d. Paleoz. Form., 1888, p. 12, 



PI. i, figs. 1-4. 

 Pinites Brandlingii Lindl. & Hutt. Foss. Flora Great Britain, 1830, Vol. I, p. 



1, PI. i ; Witham Eutern. Struct., p. 73, PI. ix, figs. 1-6 ; x, figs. 1-6 ; xvi, 



fig- 3. 



Arauearites Brandlingii Gopp., in Bronn Gesch. d. Nat., Vol. in, p. 42. 

 Dadoxylon Brandlingii Eudlicher, Synop. Conif., 1847, p. 299. 

 Araucarioxylon Brandlingii Kraus, in Schimp. Pal. Veg., Vol. II, p. 382. 

 Cordaioxglon Brandlingii Felix, Sitzb. d. Natf. Gesell. Leipzig, 1882, Bd. ix, 

 p. 6. 



Trunk branching, with large medulla; the concentric rings obsolete; 

 tracheids amply provided with bordered pits, which are in two to four, 

 rarely one to five, contiguous, alternating series; inner pores oblong; 

 medullary rays in a single or rarely in two series of two to forty super- 

 imposed cells. (Goppert.) 



Very widely distributed species, occurring at Wideopen, near Gos- 



forth ; Hill Top, near Ushaw; Westgate, near New Castle; Newbeggin, 



Northumberland; Waldenburg, in Silesia; Saarbrucken ; Central 



France, etc. 



6. Cordiates medullosus Gopp. 



Goppert in Nacbtriige z. Kenntness d. coniferenbolzer d. Paleoz. Form., 1888, p. 



22, PI. i, fig. 11 ; ii, figs. 12-24 ; in, figs. 25, 26. 

 Arauearites medullosus Goppert, Foss. Fl. d. perm. Form., 1864-65, p. 259, PI. 



lx, figs. 3-8. 

 Araucarioxylon medullosum Kraus, in Scbimp. Pal. Veg., II, p. 383. 



Trunks branching ; medulla large, in the smaller branches of differ- 

 ent ages the woody body becomes narrower, transversely septate; con- 

 centric circles obsolete ; tracheids pitted, the pits in one to two, rarely 



