552 



J. P. BLAKE ON THE UPPER 



its differences when compared with that at Weymouth, has been 

 described before ; but the succeeding beds which connect it with 

 the section at Havre, and complete the similarity of the whole 

 to the English series, appear to have escaped description. So com- 

 pletely, indeed, have they done so that Hebert (see 41) states that 

 the Trigonia-grits of Havre are separated from the base of the 

 Kimmeridge Clay by 160 feet of marls which overlie the Corallian 

 beds at Hennecqville, these 160 feet being obviously the overlying 

 clays which have slipped forward and covered the grits which are 

 seen in situ further on. Though of considerable thickness, they 

 have been subjected to so much disturbance that they make but 

 little show even "when exposed, as on the shore on either side 

 of the village of Yillerville. First, overlying the last-named grit of 

 the Corallian series, which forms an admirable base line, are about 

 8 feet of marls ; and nest a series of remarkable hard beds filled 

 with small shells. These extend through about 4 feet, and are 

 flaggy ; some of the bands are crowded with a small Oerithium ; 

 others have abundance of Astarte snpracoralUna, Cardium deli- 

 batum?, and Eccogyra bruntrutana. Next come perhaps 10 feet 

 (more or less) of grey marls ; over which lies, apparently in situ, a 

 gritty bed full of black pebbles ; then more marls, 8 feet to 10 feet ; 

 and finally, in this locality, 3 feet 6 inches of oolitic ironstone 

 and associated marls with Pecten midas. All these are seen together 

 to the west of Yillerville. On the east side, presumably the same 

 oolitic ironstone bands are seen in slipped masses on the strand, 

 followed in an upward direction by flaggy sandy marls full of 

 Pleuromya Voltzii ; then some more marls, 8 feet ; next a bed of 

 small oysters {Exogyra nana or bruntrutana), 1 foot ; next 3 feet of 

 soft marl ; and then the ?emarkable sandy grit with Trigonice, so 

 well known at Havre and Weymouth, about 1 foot in thickness ; 

 above which come about 4 feet of clays with two bands almost made 

 of 0. deltoidea ; and finally the ordinary completely argillaceous 

 Kimmeridge Clay, which so often slips down and masks the beds just 

 described. If any one compares this section with that at Sandsfoot *, 

 he will see an almost exact identity, in which the ironstone, the 

 lumachelle, and the Trigonia-grits hold their relative positions and 

 almost their distances — the only difference being that the 0. -deltoidea 

 beds appear here to lie, as they are said to do at Havre, above the 

 Trigonia-grits instead of below. The fossils also are equally charac- 

 teristic, those noted being Ammonites cymodoce, Belemnites nitidus, 

 Littorina pulcherrima, Natica eudora, Pholadomya " Protei," Opis 

 angulosa, Astarte Micliaudiana (called ovata before), A. trigonarum, 

 Gyprina Gonstantini, Cyprina cyreniformis?, Trigonia Meriani, 

 T. muricata, T. papillata, Mytilus pectinatus, Pecten midas, P.supra- 

 jurensis, P. minerva, Gervillia Jcimmeridiensis, Serptda gordialis, 8. 

 quinquangularis , S. tetragona, and Montlivaltia Lesueurii. The pre- 

 sence of this latter fossil is of interest as showing that coral-growth 

 had not died out here ; for it must be to the lower portion of this 

 series that the " Upper Coral Rag " seen in Eingstead Bay must be 

 * Q. J. G. S. vol. xxxi. p. 241, and vol. xsxiii. p. 270. 



