460 Palaeontologie. 



Jersey: Taxodium distichum, Pinus taeda, Hicoria glabra, Quercus 

 cf. phellos, Vitis speudo-rotundifolia sp. nov.. Vitis cf. aestivalis, 

 Nyssa biflora and Zisyphus sp. Berry. 



Berry, E. W., An Engelhardtia from the American Eocene. 

 (Amer. Jour. Sei. IV. 31. p. 491-496. taf. 1—2. 1911.) 



Describes Engelhardtia (Oreomunnea) mississippiensis from the 

 early Eocene of northern Mississippi. A map showing the present 

 distribution and fossil oecurrences of the genus is given. Berry. 



■* 



Berry, E. W., A Revision of several genera of gym- 

 nospermous plants from the Potomac Group in Mary- 

 land and Virginia. (Proc. U. S. nat. Mus. XL. p 289—318. 

 May. 1911) 



A revision of the species of Sphenolepis, Arthrotaxopsis, Cepha- 

 lotaxopsis, Widdritigtonites, Brachyphyllum , Sequoia, Abietites, and 

 Pinus which oeeur in the Lower Cretaceous of Maryland and 

 Virginia. Berry. 



Brown, A. P., New Cycads and Conifers from the Trias 

 of Pennsylvania. (Proc. Ac. nat. Sei. Philadelphia. LXIII. 

 p. 17-21. 5 pl. 1911.) 



Describes and figures supposed new species of Podosamites, 

 Zamites, Palissya and Cheirolepis from the Norristown shales of 

 Bucks County, Pennsylvania. Berry. 



Hannibal, H., A Pliocene flora from the Coast Ranges of 

 California. (Bull. Torrev Bot. Club. XXXVIII. p. 329-342. 

 pl. 15. July. 1911.) 



A flora of twenty species is described from the Santa Clara 

 formation which is considered to be of late Pliocene age and 

 lacustrine in origin. The species are all still existing forms and the 

 following genera are represented: Ahius, Amelanchier , Arbutus, 

 Arctostaphylos, Cephalanthus, Cercocarpus, Cornus, Grossidaria, 

 Padus, Pasania, Popidus, Pseudotsuga, Psoralea, Quercus, Rham- 

 nus, Salix, and Sequoia. These are said to indicate cool climatic 

 conditions due to secular change and not to elevation. Berry. 



Jeffrey, E. C. , The nature ofsome supposed algal coals. 

 (Proc. amer. Acad. Arts and Sei. XLVI. p. 273—290. pl. 1-5. 1910.) 



The author maintains that the algal hypothesis of the origin of 

 petroleum and similar substances is erroneous and that these mate- 

 rials have been derived from the waxy and resinous spores of 

 vascular cryptogams laid down in shallow carboniferous lakes. 

 These layers are supposed to have formed cannels, bogheads, or 

 bituminous shales aecording to the sporal composition and admixture 

 of earthy matter. Pressure and temperature, either separatel} r or 

 combined, have brought about the distillation of petroleum. 



Berrv. 



