72 A. J. Jukes-Broivne 8f W. EiU—Gautt and Chalk Marl. 



(i) Grey and pale blue clays, with light fawn-coloured bands 



near base. Thickness, 36 feet. 

 (/) Imperfect ironstone band not well seen. Thickness, 3 feet. 

 (/c) Bhie sandy clays, with mottled brown patches of soft earthy 



ironstone near the base. Thickness, 60 feet, the upper fifteen 



feet of which consists of a bluish sandy clay, and contains the 



following: fossils : — 



Terehellum sopitum. Brand. 

 Valuta humerosa, Edw. 

 Fyrida tiexlis, Lam. 

 JVatica, sp. 



Calyptrma trochiformis, Lam. 

 Ostrea fiahellula. Lam. 

 I'ecten carinatus, Sow. 



Lima, sp. 



Avicula media, Sow. 



Area, sp. 



Pectunculus deletits. Brand. 



Limopsis scalaris. Sow. 



Nucula bisulcaia. Sow. 

 Chama squamosa, Brand. 

 Cardium porulosum. Brand. 

 Lucina gibhosula, Lam. 

 Crassatella lenuisulcata, Edw. 

 Cyx)rieardia sp. 

 Cardita oblongo. Sow. 

 Cytherea ienuistriata. Sow. 

 Tellina amhigua? Sow. 

 Corbula fictts ? Brand. 

 Panopcea intermedia, Sow. 

 Shizaster P'Urbam, Forbes. 

 Ditrupa plana. Sow. 



For the convenience of collectors, I give the following measure- 

 ments taken along the cliff at high-water, commencing with the 

 Bracklesham Sandstone, which can always be seen, so that the strata 

 under consideration can be found at any time : — 



Bracklesham Sandstone to the N. elegans zone 126 feet 



N. elegans zone to top of Barton 161 ,, 



Top of Barton to top of Uj)per Bagshot 186 ,, 



Lower Headon 19 ,, 



The Whitecliff Bay section is almost conijolete from the Chalk to 

 the top of the Bembridge Series, as it not only shows a good exposure 

 of Barton Clays, but also the Brockenhurstand Eoydon zones (Middle 

 Headon). It is therefore by far the most perfect section of the 

 Tertiarj'^ formation in England. 



I am indebted to Prof. Eupert Jones for examining the specimens 

 of Nummulina, both from the Bracklesham and Bai-ton Series; he 

 considers N. elegans to be the only species found in the Barton, 

 the so-called N. variolaria, found some forty feet above the true 

 N. elegans zone, being only a thickened form of N. elegans. 

 There seems, therefore, to be only one species in the Barton 

 and two in the Bracklesham Series. 



It will be seen that a few of my measurements differ slightly from 

 those given by Professor Prestwich : this is due to the latter having 

 been made along the cliffs, while mine were taken on the shore at 

 low-water. 



The specimens referred to in the above paper are preserved in the 

 Woodwardian Museum. Cambridge. 



V. — Note on the Gtault and Chalk MARii of West Norfolk. 

 By A. J. J,ukes-Browne, B.A., F.G.S., and W. Hill, F.G.S. 



XTNTIL the appearance of the article by Messrs. C. Eeid and G. 



\J Sharman in the Geological Magazine for February, 1886, 



p. 55, no one had ever thrown a doubt on the existence of true Gault 



