136 Reviews — Berri/'s Flora of Raritan Formation. 



England, llepresentatives of the Porest Marble and Bradford Clay 

 are seen in the Calcaire a, Bryozoaires (Pierre de Langrune) with 

 Bictyothyris coardata, Magellania digona, etc. 



Callovian and Oxp-okdian. In this series the grouping in mass 

 corresponds with that in England, but the Callovian is taken 

 to include much more than the Kellaways Bedsof this country, 

 the Oxfordian being restricted by the author to the zone of 

 Cardioceras cordatum. The intimate connexion between the 

 Bathonian (Corn brash, etc.) and the Corallian is shown by 

 the fossils recorded fi'ora the lower and higher portions of the 

 Callovian and Oxfordian respectively, on the western side of 

 the Paris Basin. 

 Corallian. This variable series of strata is subdivided as follows, 

 the species of Ammonites taken to mark zones differing from 

 those adopted in England : — 



Sequauian : Zone of Perisphinctes Achilles, associated with 



Zeilleria Tiumeralis. 

 liauracian : Zone of P. Achilles. 



Zone of Peltoceras hicristatum and Ochetoceras 

 Marantianum. 

 Argovian : Zone of 0. canal iculattim and Perisphinctes 

 variocostatus} 

 The Corallian fossils vary in distribution according to the sedimentary 

 nature of the strata. Thus Perisphinctes plicatilis occurs in Argovian 

 limestones in the valley of the Yonne. 



KiMERiDGiAN'. This iucludes the following zones : — 



Zone of Reineckeia eudoxus and Aspidoceras caletanum (Upper 



Virgulian). 

 Zone of A. orthocera and A. Lallierianum (Lower Virgulian). 

 Zone of Pictonia Cymodoce (Pterocerian). 

 PoETLANDiAN. Tliis includcs — 

 Zone of Perisphinctes hononiensis. 

 Zone of Stepheoceras portlandicum. 

 It is noteworthy that Hemicidaris purhecliensis occurs in higher 

 Portlandian of Haute-Marne and Meuse, where the uppermost strata 

 yield Pinna suprajurensis, Trigonia concentrica, etc. In the Boulonnais 

 the highest strata are noted as fluvio-lacustrine with Phi/sa, Planorbis, 

 etc., equivalent to part of our Purbeck. In lower stages there occur 

 Cyrena, Corhila, Trigonia, Perisphinctes giganteus, etc. 

 (To he concluded in our next Number.) 



III. — The Elora of the IIaritan Formation. By E. "W. Berry. 

 Bull. Ill, Geol. Surv. New Jersey, 1911. pp. 1-233, with 29 plates. 



rpmS noteworthy contribution to the study of the Cretaceous floras 

 JL of the United States is in the main a revision of Newberry's 

 posthumous monograph, The Flora of the Amhoy Clays. In addition, 

 several new plants, as well as species from new localities, are described, 



^ This species, described by Buckland as Amvionites variocostatus in his 

 " Bridgewater Treatise ", is usually spelt varicostatus in English works. 



