42 Revieivs — TeaWs ' Sedgwick F)Hze Essay. ^ 



niian deposit has suffered denudation. As tlie workings at Wicken 

 (Upware) are abandoned, Mr. Teall reprints the sections which were 

 published in this Magazine, and tries to determine the derived fossils. 

 He next gives a list of the indigenous fossils contained in the Wood- 

 wardian Museum. We are sorrj^ to differ from the author with 

 regard to the Brachiopoda; he states that "it is more than probable 

 that variable types have given rise to the unnecessary multiplication 

 of S23ecies. Thus T. microtrema, T. Dallasii, and T. Lanhasteri are pos- 

 sibly varieties of T. p^oelonga (Sow.) ; at least there are indications of 

 transitional forms." This is more to be regretted, as the author has 

 not corrected his list of Briichiopoda according to Mr. Davidson's 

 Cretaceous Supplement : probably when he has consulted this work, 

 he will modify his views on this subject. The author next gives 

 a general sketch of the Neocomian deposits of Norfolk, Bedford, 

 Cambridge and Buckingham ; this has been carefully done, and 

 contains many very interesting sections. He has not settled the 

 question whether an old Neocomian (?) rock occurs in position under 

 the bed of the river Cam between Upware and Ely. The author 

 does not seem, however, to be aware of the valuable paper by Prof. 

 Morris which appeared in the Geol. Mag. Vol. IV. for 18G7, p. 456. 

 In concluding this branch of the subject, he reviews the Neocomian 

 strata thus: "In Norfolk they are seen to consist of a threefold divi- 

 sion, a loose sandy deposit at the base, resting unconformably on 

 Kimmeridge-clay ; next an argillaceous division, with ironstone nodules 

 and fossils; and, lastly, true carstone, an indurated and highly ferru- 

 ginous sandstone. The ' Carstone ' in its turn appears to be conform- 

 ably overlain by the ' Eed Chalk,' and to pass gradually into that 

 deposit." In tracing the deposits to the south, first the argillaceous 

 division thins out, and also the overlying carstones, both of which seem 

 to become subordinate to the loose sand series ; the whole is gradually 

 attenuated, and the conglomerate and pebble-beds are intercalated. 

 The author rightly concludes from strati graphical and palseontological 

 considerations that the Potton and Upware deposits belong to the 

 very latest part of the Neocomian period, and that their affinities are 

 to be sought for in the Folkestone beds of the South of England. 



Mr. Teall next briefly points out the probable relations of the 

 Neocomian deposits of the central and eastern counties to the strata 

 of Western Europe, lying between the Portland Beds and the Gault. 

 He considers, with Prof. Phillips, that the fluviatile ironsands of Shot- 

 over, Brill, and Hartwell, belong to an older period than the marine 

 sands of Seend, Earringdon, and Culham, near Oxford ; and that the 

 denudation of the older sands furnished much of the material for 

 the Woburn and Potton series. We are disappointed that the author 

 has not more fully considered the relations of these deposits to the 

 foreign strata, and endeavoured to determine the age of the deposit 

 at Essen, and of the Tourtia of Belgium, which have been referred 

 to both the upj)er and the lower part of the Cretaceous formation. 

 We quite agree with the author in considering the Upware, Potton, 

 Earringdon, Godalming, Brickhill, and Eolkestone beds, belong to the 

 same stage as the Aptien of Erance and Switzerland. It may be de- 



