334 . Scientific Intelligence. 



any one to contend about, because it is now known that the 

 Aniboy Clay flora occurs near the base of the Tuscaloosa forma- 

 tion in Alabama and Mississippi. He has therefore proved too 

 much and is anticipated by Dr. Eugene Smith, at least as to his 

 proposed name. And really this is here the main thing, since 

 the iacts have been long known and accurately mapped, at least 

 in New Jersey. The great question is that of correlating the 

 Potomac formation with the New Jersey beds, or of showing 

 what relation subsists between them. On this question the pres- 

 ent paper throws no clear light. The one service which Prof. 

 Uhler's investigations are doing is that of drawing attention to 

 the fact that the great Lower Cretaceous non-shell-bearing belt 

 of the Atlantic border region, though doubtless a geological unit 

 (which he denies), occupied a vast period in its deposition, was 

 attended by great vicissitudes and oscillations of level, and must 

 be studied as a series of successive deposits rising stratigraph- 

 ically from its landward toward its coastward margin and 

 changing greatly from one level to another. l. f. w. 



7. The Fossil Flora of the Bozeman Coal Field ; by F. H. 

 Knowlton. Proc. Biol. Soc. Washington, vol. vii, July 1892, 

 pp. 153-154. — In this short paper Prof. Knowlton sums up the 

 results of a prolonged investigation soon to be published in full 

 by the Geological Survey. Altogether 43 species of fossil plants 

 have been found in the Bozeman coal field only three of which 

 are new, most of the others occurring in other parts of the west. 

 The small number of Fort Union species seems to show that 

 these deposits do not form a part of the series of beds that 

 extend along the Missouri and Yellowstone rivers in Dakota and 

 Montana. On the other hand the forms found are largely those 

 of the true Laramie and overlying Denver formations of Colorado 

 and Wyoming, between which they are pretty equally divided. 

 This seems to fix the horizon of thisj coal region with consider- 

 able accuracy, and shows that the great Laramie sea occupied 

 the same position relatively to the Rocky Mountain uplift in 

 Montana as it does farther south. The most interesting form is 

 the Thinnfeldia polymorpha, which seems to be a sort of con- 

 necting link between the ferns and the conifers of the Ginkgo 

 type, and is also strongly suggestive of the Glossopterid forms of 

 Australia and India. l. f. w. 



8. Paleontologie Vegetale (Ouvrages publies en 1890), par R. 

 Zeiller. Extrait de l'Annuaire Geologique Universel, Tome 

 VII, 1890, pp. lllo-lloV, Paris, 1892. "This is another of the 

 series of admirable reviews of paleobotanical literature by M. 

 Zeiller, of which four others have previously appeared. It is 

 very thorough and searching, no less than 138 different works* 

 and papers being treated. The plan is to deal first with the gen- 

 eral works and discussions and then to take up the special works 

 in the ascending geological order of the formations. These are 

 subdivided into Paleozoic, Antecretaceous Secondary, and Cre- 

 taceous and Postcretaceous. A special department is devoted to 



