198 



DKSCBIPTIYE CATAI.' 



not occur in any of the higher Gymnosperms, though there 

 are multiseriate rays in several of the Paheo/.oic forms of the 

 Cordaitean and Poroxylon affinities. In our specimen the large 

 size of the pieces of petrified wood from which the sections were 

 cut, coupled with the curve of the annual rings, etc., indicate that 

 we are dealing with outer zones of wood from a large trunk, so 

 that the remarkable appearance illustrated in PI. XV I II. tig. :.'. 

 must he normally characteristic of the spe 



As has been noticed by many, there is a slight tendency for 

 species of Ottprnsinoxylon to have rays in which one or two of 



Text-fig. 57. Cuprfssinoxylon Horfii. ^>. n<v. Tantrenf ial section. s 



biseriate rays, ///.: resin-containing parecehjma, r/>. : ami tnu-ln-itU 

 in which the bordered pits on the radial walls (p.) hav- lieen curiously 

 petrified. No. V. 11847 f. 



the cell-rows arc biseriate ; so it seems best, tit present i\t any 

 rate, to include this anomalous species in the genus Ctip-rfsftiim- 

 .rv/Zon, more especially as it has numerous large resin-pa ren- 

 eliyma cells scattered through its wood, though the exceptionally 

 large single pits in the radial walls of the medullary rays art- 

 very suggestive of Podocarpoxylon. 



