r 



t I 



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14 CANADIAN FOSSILS. , 



The three following sp'^ciea are allied forms from Now York and Ohio : 



2. Dadoxylon ffalli, Dn,— (PI. I, Figs. 5, 6.)— J. G. S., XVIII, 806 ; 



PI. XIII, Fig. 11.— M.D., New York. 



" Wood-cells very large, with five rows of contiguous, alternate, hexagonal 

 areoles. Medullary rays very frequent, and with as many as thirty 

 rows of cells superimposed." 



On this species I have no further information to offer, and merely figure 

 a few cells for the sake of comparison. The chief diflFerence between it 

 and the last species is in its medullary rays, which are very frequent and 

 composed of as many as thirty cells superimposed. 



3. Badoxylon Newberryi, Spec. Nov., — (PI. I, Figs. 7 to 9.) — M.D., Ohio. 



Cells mort 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. 



This is a specimen of wood communicated to me by Dr. Newberry, 

 by whom it was collected in the Hamilton Group (Middle Devonian) in 

 Ohio. It indicates a form quite distinct from the preceding, and more 

 nearly akin to the Carboniferous conifers. 



Genus Ormoxylon — Dn. 



^.— Ormoxylon Erianum, G. & S. N.— (Pi. I, Figs. 10 to 14.)— M.D., 

 New York. (Portage Group.) 



Woody stems, with cells of the character of those of Dadoxylon, very thick- 

 walled,with three rows of hexagonal areoles, having oval pores. And 

 Medullary rays of one row of cells. Pith-cavity composed of a 

 series of spherical chambers, separated by thick transverse cellular 

 partitions. 



The specimen from which the above characters are derived was col- 

 lected by Prof. Hall in Schoharie County, New- York. At first sight it 

 has the appearance of a stem of Megaphyton, with a row of circular leaf 

 scars, but on closer examination this appearance is found to be deceptive ; 

 the round spots being in reality casts in fine sandstone of a series of cham- 

 bers, constituting a pith-cavity, and enclosed in a flattened carbonized stem. 

 Before being flattened, the stem with this singular medullary cylinder 

 must have borne some resemblance to the shell of an Ormoceras, a cir- 



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