190 Palaeontologie. — Agricultur, Horticultur und Forstbotank. 



California, Montana and Oregon; Part Ili which occupies the 

 largest share of the voiume, is devoted to the Cretaceous Flora as 

 presented in the Queen Charlotte Islands, the Kootanie of 

 Montana and British Columbia, the Lakota (Kootanie) of 

 the Black Hills, the Trinity of Texas and the Older Potomac of 

 Maryland and Virginia. 



Among the conclusions to which a study of the Jurassic flora 

 leads, may be noted the remarkably large proportion of such plants 

 which are common to Oregon, Yorkshire, England and 

 eastern Siberia. A comparison of these widely separated floras 

 shows a remarkable similarity between those of eastern Asia and 

 western America, with respect to the number and kinds, of the 

 types of Ginkgo, and Prof. Ward infers from the evidence, that 

 a definite land connection existed in Jurassic times, between Asia 

 and northwestern America. The very large addition of about 

 600 Cycads from the Jurassic of Wyoming, to the previously 

 reported lists, constitutes a very striking feature of this part of the 

 report. 



The Chief interest centers in the various discussions of the Potomac 

 formation which is now shown to include not only the formations in 

 Virginia and Maryland hitherto recognized under that name, 

 but the Shasta of California and Oregon, the Lower Cretaceous 

 of Queen Charlotte Islands, the Kootanie of British Co- 

 lumbia and Alberta, the Lakota of the Black Hills and the 

 Trinity of Texas. In endeavoring to estabiish the precise relation 

 of the Lower Potomac to the Jurassic and the Lower Cretaceous, 

 Prof. Fontaine points out that this really hinges upon the question 

 of the Wealden formation which he had originally held to be Lower 

 Cretaceous, agreeing with the Neocomian. This conclusion was 

 based upon the strong affinity of the Lower Potomac flora with that 

 of the Wealden, and he now finds that there has been no evidence 

 sufficient to cause a change of this opinion, but, on the contrary, 

 a good many facts have come to light that confirm its correctness. 



D. P. Penhallow. 



Damseaux, Ad., Les plantes de la grande culture; Agri- 

 culture speciale. 2« Edition. (Namur, Lambert-De Roisin; 

 Bruxelles, G. Mayolez et J. Audiart, 1905. 475 pp.) 



Les faits generaux relatifs ä toutes les plantes ayant dte dtudi^s 

 par l'auteur dans son livre intitule „Manuel d'agriculture generale", 

 il convenait de determiner leurs modes d'application aux plantes de 

 la grande culture. Celles-ci ont dt6 rangees en 7 groupes. Dans le 

 groupe I, consacr^ aux plantes ä graines farineuses, deux sections 

 ont dt6 Stabiles, l'une pour les cdr6ales, l'autre pour les Legiimi- 

 neuses ä semences farineuses. Dans la premiere section, l'auteur 

 ddbute par des consid^rations g6ndrales d'ordre physiologique et 

 ^conomique, puis vient l'examen des diverses cdreales que l'auteur 

 a r^parties en deux sous-sections: 1" Celles d'un caractere presque 

 cosmopolite, comprenant essentiellement le Froment, l'Epeautre, le 

 Seigle, l'Avoine, l'Orge, oü l'embryon en d^veloppement dmet 

 plusieurs radicelles et oü le fruit, nu ou vetu, est pourvu d'un sillon 

 iongitudinal; 2" celles des climats chauds comprenant surtout le 

 Mais, le Riz, le Millet, le Sorgho ainsi que quelques autres plantes, 

 oü il n'y a qu'une radicule chez l'embryon en d^veloppement, le 

 fruit ^tant aussi nu ou vetu, mais sans sillon Iongitudinal. Pour 

 ce qui concerne le Froment, l'auteur, aprös avoir rappelt les carac- 



