96 Palaeontologie. 



ceous Pine Leaves. (Annais Bot. XXIV. p. 395—402. pls. 

 XXVII— XXVIII. 1910.) 



The paper describes and illustrates tlie anatom}' of two new 

 species of Pine leaves from the Japanese Cretaceous nodules, and 

 considers them in relation to those described by others from 

 America, as well as to the living formes. The species described 

 are: Prepinus japoniciis. sp. nov., a type unlike any living pine. 

 and with fine straight sides in section, and lateral resin canals, 

 much transfusion tissue but no apparent endodermes, and no 

 centripetal xylem : Piniis yesoeiisis sp. nov. a form much like the 

 living Pinus with a well marked endodermis and large ridged 

 assimilative cells. M. C. Stopes. 



Thompson, W. P., The Structure of the Stomata of 

 certain Cretaceous Conifers. (Bot. Gaz. LIV. p. 63—67. 

 pl 5. 6. 1912.) 



The author has made a study of the anatomical features of the 

 stomata of Froielopsis occidentatis (Heer) from the Cretaceous of 

 Portugal and of the same parts in the existing Agathis bornensis 

 as well as in the .American Cretaceous species Androveltia state- 

 nensis HoUick and Jeffrey and Bvachyphylliiin tnacrocarpoji New- 

 berry. He concludes that the supposed guard cells described b}' 

 Zeil 1er and ßerry are conical internal projections from a circle 

 of accessory cells, the two true guard cells being sunken and 

 hidden and usually not preserved in fossilized remains of the 

 epidermis. Berry. 



Thomson, R. B. and A. E. Allin. Do the Abietineae extend 

 to the Carboniferous? (Bot. Gaz. LIII. p. 339—344. pl. 26. 

 f. 1—2. 1912.) 



This paper is based on re examination of the t5'^pe sections of 

 Pityoxylon chasense Penhallow from the Permian of Kansas. The 

 question is important since the supposed occurrence of the Abietineae 

 in the Paleozoic rests on this species and on the Single other species 

 Pityoxylon Conwentsianiim Goeppert which is supposed to have 

 come from the Carboniferous of Waidenburg. Gothan has recently 

 shown that the latter could hardly have come from the Carboniferous. 



The authors find that Pityoxylon chasense lacks resin canals 

 and therefore cannot be a Pityoxylon while on the other hand the 

 absence af annual rings, the character of the ordinär}' medullary 

 rays which are one to partially seriate with thin-walled unpitted 

 parenchj'ma, and the multiseriate, alternate and hexagonal radial 

 pitting of the tracheids are conclusive evidence of cordaitean affinity. 



Berry. 



Wherry, E. T., Silicified wood from the Triassic of Penn- 

 sylvania. (Proc. Acad. Nat. Sei. Phila. p. 366—372. pl. 3, 4. 

 July 1912.) 



This contribution lists and maps the localities where silicified 

 wood has been found in the Triassic of Pennsylvania. The 

 three following species based upon a study of thin sections are 

 described: Araticarioxylon virginianiim Knowlton, Arancarioxylou 

 vanartsdaleni sp. nov. and Brachyoxylon pennsylvanicum sp. nov. 



