Sinnott and Bartlett — Coniferous Woods. 285 



forms (not including Pinus) which possess " podocarpoid " or 

 " eiporig " pitting : Gupressinoxylon sp. of Hollick and Jef- 

 frey* from Kreischerville, N. Y.; Paracupressinoxylon sp. of 

 Miss Holdenf from Cliffwood, N. J.; Podoearpoxylon spp., 

 Paraphyllocladoxylon spp. and Xenoxylon spp. of Miss 

 Holdenf from the Jurassic of Yorkshire ; Phyllocladoxylon 

 sp., Xenoxylon spp., Anomaloxylon sp., Protocedroxylon sp., 

 and Cupressinoxylon cf. McGeei of Gothan§ from the upper 

 Jurassic of Spitzbergen and King Karl's Land. Gothan 

 included this last species in Cupressinoxylon rather than in 

 Podoearpoxylon because borders to the lateral ray pits seemed 

 quite absent, a character which from Knowlton's figures of 

 (J. McGeei he believed to distinguish that species also. We 

 have shown, however, that well-marked borders occur in 

 material which is presumably identical with Knowlton's. 

 (Unfortunately the type slides of Knowlton's species have been 

 lost or misplaced and could not be consulted in the preparation 

 of this paper.) One of the writers has also collected wood 

 with this general ray structure from the (presumably) Jurassic 

 of Southland, New Zealand. 



This type of wood with big-pitted ray cells seems, therefore, 

 to have been rather common and widely distributed during the 

 Mesozoic. Not all the species cited, however, have been refer- 

 red to the Podocarpineae. It is significant that Paraphyllo- 

 cladoxylon and Xenoxylon, from the absence of " Bars of 

 Sanio" and the frequently alternating and flattened condition 

 of the tracheid pits, are believed by Miss Holden to be arau- 

 carian in their affinities. She calls attention to the presence 

 of " abortive " bars of Sanio in Xenoxylon phyllocladioides. 

 The genera Anomaloxylon and Protocedroxylon of Gothan are 

 also distinguished by tracheid pitting intermediate between 

 araucarian and non-araucarian types. If such forms as these 

 with large ray pits are indeed to be regarded as intermediate 

 between the abietineons and cupressineous type and that of the 

 Araucarineae, the conclusion suggests itself that the Arau- 

 carineae are related more or less closely to the Podocarpineae. 

 A considerable body of evidence derived from a comparative 

 study of the reproductive structures has been brought forward 



* Hollick, A., and Jeffrey. E. C, Studies of Cretaceous Coniferous 

 Remains from. Kreischerville, New York. Mem. N. Y. Bot. Gard. Vol. Ill, 

 1909. 



f Holden, R., Contributions to the Anatomy of Mesozoic Conifers. No. 2, 

 Cretaceous Lignites from Cliffwood. New Jersey ; Bot. Gaz. 58 : 168-176, 

 1914. 



\ Holden, R., Contributions to the Anatomy of Mesozoic Conifers. No. 1, 

 Jurassic Coniferous Woods from Yorkshire, Ann. Bot. 27 ; 533-545, 1913. 



§ Gothan, W., Die Fossilen Ho] zreste von Spitzbergen. Kungl. Svenska 

 Vetensk. Akad., Handl., xlv, No. 8, 1910. Die Fossilen Holzer von Konig 

 Karls Land. Kungl. Svenska Vetensk. Akad., Handl., xlii, No. 10, 1908. 



