120 MESSES. A. J. JUKES-BBOWNE AND W. HILL : [May 1 896, 



place is full of glaucorrite. The lower 10 feet of this series is a 

 material which resembles the Gault at Black Ven, near Lyme Regis; 

 it is doubtless from this 10 feet and from the overlying 23 feet of 

 less dark and slightly micaceous marl that the Gault species have 

 been obtained. We have, indeed, obtained Ammonites rostratus (var.) 

 and Ammonites auritvts from the upper beds in a large fallen mass 

 at Cape La Heve. These higher beds we regard as the Gaize or 

 zone of Ammonites inflatus, the representative of the Cowstone beds 

 at Black Yen, of the Malmstone, and of the grey micaceous sands 

 which form the lower part of the Upper Greensand in Wiltshire and 

 North Dorset. 



The Gault is poor in fossils, but we have found Pecten orbicularis 

 and Exogyra conica just above the phosphates near Cape La Heve. 

 The following is a list of the fossils which we found in the upper 

 beds (Gaize) at Cape La Heve and St. Jouin : — Holaster Icevis, Ostrea 

 lateralis, 0. vesicularis, Avicula (near to Mauliniana, d'Orb.), 

 Lucina Dupiniana, Thetis Sowerbyi, Avellana incrassata ( ?), Gibbula 

 levistriata (?), Ammonites auritus (typical form), A. Baulinianus (?) 

 small, and A. rostratus (a form resembling one common in the Gaize 

 of Devizes). In the very highest layer, just below the Chloritic 

 Marl, Bhynchonella convexa and Rh. Schloenbachi occur. 



The section on the preceding page shows the succession of the 

 beds below the Cenomanian which form the headland of Cape 

 La Heve. 



The Cenomanian (Bed 5). 



We dissent entirely from Prof. Hebert's classification of beds 4 

 and 5, and agree with that of M. Lennier and Prof, de Lapparent, 

 for there can be no question as to the exact horizon where the dis- 

 tinctive Cenomanian fauna sets in. 



M. Lennier gives the total thickness of this division at Cape La 

 Heve as 32*75 metres (108 feet). Our measurements give only 

 about 90 feet from the base upwards, and although more chalk is 

 to be seen above this, it is not well shown or easily examined. 

 With regard to detailed measurements, our own do not quite tally 

 with those of M. Lennier, but we differ only in such manner as may 

 occur between persons who measure a somewhat variable set of beds 

 at different times and at different points in a long cliff-section. 



M. Lennier 1 has given a complete section of the Cenomanian of 

 Cape La Heve ; he divides it into 11 beds, 10 of which are seen 

 at La Heve, the uppermost only coming in between Brunval and 

 St. Jouin. He describes the basement-bed as a soft sandy glauconite, 

 sometimes containing hard blocks (' roches '), with nodules of 

 phosphate of lime perforated by lithodomous mollusca, from 1 to 2 

 metres thick. This bed is very rich in fossils, the commonest being 

 Ammonites Mantelli, A. varians, Pleurotomaria perspectiva, PI, 

 Mailleana, Ostrea conica, 0. serrata, 0. Lesueuri, Spondylus striatus, 

 Jthynchonella compressa, etc. 



Prom this description there can be no doubt that he takes the 



1 Bull. Soc. Geol. de Normandie, vol. vi. (1880) p. 380. 



