[I'KVHAMXJwJ NOHTII A.MKKICAN SI'KCIKH OK DADOXYLON 69 



badly preserved, wo may siiy without hosiUition, that enough cliaractera 

 are recognisable to eliminate ull rea.sonable doubt on this point. 



Trannverae. — Structure much altered by decay, extensive areas !)elng com- 

 pletely carbonised and eonsoildated to coal. The Iraihelds are 

 about 34 X 44 mic. broad, the walls much attenuated by decay. 



/fndfo/.— Structure of the rays not determinable. 



Bordered pits hexagonal, 9.5 mIc. broad, in 2-3, chiefly 2 rows. 



Tangential.— The structure Is too much altered by decay and pressure to 

 make the i.etails obvious. 



('OTIOATTE.S M.VTKRI.VnilM, Dn. 



Figs. 13, 14, 17. 



Bib. :— DawLion, Kept, on the Oeol. Struct, of P. E. Island, 1871, 42; Can. Nat., 

 VlII., 1863, 433; Acad. Geol. ed. 3, 1878, 473; Quart. Jn'l Oeol. Soc., 

 XXII., 1866, 96, 127, 128, 141, 145; Quart. Jn'l Geol. Soc, 1874, 215, 

 216; Can. Rec. Sc, I.. 1885, 158; Grand'Eury, Geol. et Pal. du Bass. 

 Houil. du Gard., 1890, 316; Proc. U. S. Nat. Mus., XII.. 1890, 608. 



Dist. :— Holmes Co., Ohio (Newberry); Upper Coal Measures of Malagash, 

 Plctou, Joggins, Belen and Cambon, N. S.; St. Georges Bay, New- 

 foundland; Mirlmichl, N. B.; Glace Bay. C. B.; Marion Co.. Illinois. 



The original description of this species, basetl upon material from 

 tJie middle and upper coal measures of the Maritime Provinces, was pub- 

 lished in 1863.* It compares the structure of the wood to that of C. 

 Brandlingii, notes the occurrence of 'a Stenibergia pith, and records the 

 occurrence of the plant in the sandstones of the upper coal formation, 

 where it is represented by va.st niumbers of trunks. 



The only notable feature of this species appears in the character 

 of the pits on the lateral walls of the ray cells. These structures show a 

 very narrow border as in the Sequoias, but in many cases this element 

 is so reduced as to become obscure, when the pit is reduced to the con- 

 dition of a simple, open {>ore, such as occurs so commonly in many of 

 the soft pines. At lirst this was attributed to loss of materiial by grind- 

 inig, but a very searching examination proved it to be a normal feature. 

 In C. materioides, the border is always more prominent, but the pore is 

 nevertheless very wide, and the whole pit bears a marked resemblance 

 to those found in Sequoia. 



Transverse. — Tracheids 45 x 75 mic. broad, the walls 7.8 mlc. thick.* Scatter- 

 ing trachelds show resinous matter. 



' Can. Nat., VIII., 1863, 433. 



' The normal thickness of the walla In this genus may be taken as 12.5 

 mlc. Anything less indicates the operation of decay. 



