RECENT ADVANCES IN SCIENCE 287 



taining Schizoneura, Cladophlcbis, Dictyophyllum and other 

 forms (Bull. Soc. Geol. France, ser. 4, vol. xiv.). 



There is no outstanding work on the Jurassic, but there 

 are several interesting papers, principally Russian. Prof. A. 

 Kryshtofovich describes plant remains from the lake deposits 

 of Transbaikalia (Mem. Soc. imp. russ. Mineral) ; and also 

 from Amurland (Trav. Mns. Geol.) ; and A. Lesnikow has a 

 paper on " Plantes Jurassiques du Caucase " (Bull. Comm. 

 Geol. 34). Our scanty knowledge of the Southern hemisphere 

 is augmented by A. B. Walkom's Mesozoic Flora of Queensland 

 (Publ. no. 252, Queensland Geol. Surv.). 



On the Cretaceous the bulkiest work is the second volume 

 of M. C. Stopes' Catalogue of the Mesozoic Plants in the British 

 Museum — 2, The Lower Greensand (Aptian) Plants of Britain. 

 This gives a complete account of all that is known of the fossil 

 flora of this age, and describes a number of new species, mostly 

 with anatomical details, illustrated by plates and text figures 

 (see Science Progress review, p. 167). Dr. E. W. Berry con- 

 siders the age of some American deposits of Upper Mesozoic 

 deposition (Bull. Geol. Soc. Amer., vol. xxvi.). Fossil plants, 

 and a consideration of Cretaceous and Tertiary Coal, are dealt 

 with by A. L. Beekly in his comprehensive work on the Geology 

 and Coal Resources of North Park, Colorado (Bull. 596, Geol. 

 Surv. U.S. A.). 



There are, as usual, a number of small papers on Tertiary 

 fossil plants, notably from America, the most interesting of 

 which are E. W. Berry's work on the Mississippi Bluffs (Proc. 

 U.S. Nat. Mus. vol. xlviii.) and the same author's work on 

 Erosion Intervals in the Mississippi Eocene (Prof, paper 95 — F, 

 U.S. Geol. Surv.). The Russians also contribute some papers 

 on the Tertiary, particularly Prof. Kryshtofovich (Bull. Acad, 

 imp. Sci. Petrograd). The Tertiary flora of Ellesmere Land is 

 amplified by Prof. A. G. Nathorst's work on the Norwegian 

 Arctic Expedition's Report, No. 35. By far the most impor- 

 tant work on Tertiary plants, however, is by the two English 

 authors, C. and E. M. Reid, which is sumptuously published 

 by the Dutch Government, The Pliocene Floras of the Dutch- 

 Prussian Border {Med. Rijksopsp. Delfstoffen, No. 6). This is 

 the most useful and authoritative work on the Tertiary flora 

 which has appeared for many years. 



Family Histories. — The Angiosperms are dealt with in a 



