No. 1, February, 1921] PALEOBOTANY 57 



3S9. Chaney, Ralph W. The flora of the Eagle Creek formation. Cont. Walker Mus. 

 2^: 115-182. PI. 5-2.2. 1920. — The paucity of described fossil floras from the Pacific coast 

 region renders this an important contribution. The Eagle Creek flora, as described in this 

 contribution, comprises 72 species, of which 38 are described as new and referred to the 

 genera Equisetum (?), Picea (?), Pinus, Cyperacites, SabalUes, Smilax, Phyllites, Populus, 

 Myrica, Hicoria, Juglans, Alnus, Betula, Conjhis, Castanea (?), Fagus (?), Quercus, Ulmus, 

 Liriodendron, Magnolia, Laurophyllum, Liquidarnbar, Crataegus, Prunus, Cercis, Legumino- 

 sites, Acer, Tilia, Nyssa, Fraxinus (?), and Carpolithus. These all appear to be well founded 

 except the Liriodendron. The local sections where the fossils were found along the present 

 Columbia River gorge, the composition, physical environment, ecology and correlation of the 

 flora are fully and satisfactorily discussed.— The Eagle Creek formation is entirely volcanic 

 in origin and stream laid. It is considered, on the basis of the intermediate character of the 

 flora between known upper Eocene and Miocene floras, to be of Oligocene age. The flora, 

 which is largely dicotyledonous, shows a striking resemblance to the mixed hardwood flora 

 of the eastern United States— this resemblance extending to even the relative representation 

 of the families, the only departures being a shortage of Salicaceae and Rosaceae and an excess 

 of Fagaceae and Hamamelidaceae. Oaks are the most abundant forms, both individually 

 and specifically. Maples and elms are also prominent elements. The flora is considered to 

 represent two principal distinct ecological types; namely, xerophytes that are thought to 

 have grown on the water poor ridges and uplands, and the contemporaneous mesophytes of 

 the well-watered valley bottom and sides.— £^. W. Berry. 



.390. De La Vaulx, R., and P. Marty, avec introduction de Ph. Glangeaud. Nou- 

 velles recherches sur la f.ore fossile des environs de Varennes (Puy-de-Dome). [New 

 researches on the fossil flora of the vicinity of Varennes.] Rev. G6n. Bot. 32: 282-300, 327- 

 336, 351-368. 3 pi., 2 fig. 1920.— A study of the fossil flora of three fossiliferous beds in one 

 of the volcanic regions of France, based on a critical examination of the material described, by 

 BotTLAY (Flore Pliocene du Mont-Dore, Paris 1872) and on new collections. The paper is 

 prefaced by a brief account of the stratigraphy of the region by Ph. Glangeaud, who agrees 

 with Boulay in assigning the beds in question to the upper Miocene or lower Pliocene. The 

 list of fossil trees, shrubs, and herbs now reported from this locality comprises 47 forms rep- 

 resenting 23 families; 37 of them have been specifically determined. The following 14 are 

 newly discovered by the authors: Ginkgo biloha Kaempf., Sparganium sp. CeUis Japeti 

 Ung., Lauris nobilis L., Carya minor Sap. et Mar., Paeonia motiton Sims., Myriophyllitis sp., 

 Cercis slUquastrum L., Raphiolepis indica Lindl., Bumelia Rieufi Marty, Fraxinus oregona 

 Nutt., Ilex decidua Walt., Ilex balearica Desf., and Rosa Glangeaudi Marty. A list of about 

 50 species of diatoms is also included.— After a discussion of the palaeontological and geologi- 

 cal evidence the authors conclude that the fossil flora of Varennes was buried during the 

 Mio-Pliocene in the sediments of a lake into which volcanic ashes were thrown. This flora 

 was continental, montane, and temperate, less than one-tenth of the species being sub-tropical. 

 The mean temperature in this region during the Mio-Pliocene was probably from 12° to 

 14°C. Since that time some of the elements of the flora have migrated 5 geographical degrees 

 southward. — Bibliography of 67 titles. — L. W. Sharp. 



391. Galipps, V. Recherches sur la resistance des microzymas a Paction du temps et 

 sur leur survivance dans I'ambre. [The longevity of microzymas and its survival in amber.] 

 Compt. Rend. Acad. Sci. Paris 170:850-858. 1920.— A microscopic examination of amber 

 after dissolving in ether reveals the presence of microzymas and of ovoid and rod-shaped 

 bacilli.— C. A^ and W. K. Farr. 



392. Lull, R. S. Organic evolution. 8vo, 729 p. The Macmillan Co. : New York, 1920. 

 Price, $3.25. 



393. MacFarland, J. M. The causes and course of organic evolution. 8vo, 875 p. The 

 Macmillan Co. : New York, 1920. Price, H.OO. 



