132 



MESSES. A. J. JUKES-BROWNE AND W. HILL : [May 1896, 



List of Fossils from the Craie de Rouen. 



Catopygus carinatus. 

 Discoidea stobucula. 

 Epiaster crassissimus, 

 Pseudodiadema variolar e. 

 Terebratula biplicata. 



lacrymosa (pvata). 



Ehynchonella alata (=dimidiata, 

 Sow.). 



■ Lamarckii. 



Ostrea pseudo-vesiculosa. 

 Inoceramus cuneiformis. 

 Corbis rotundata. 



Trigonia spinosa. 

 Avellana cassis. 

 Fusus Espaillaci. 

 Pleurotomaria, 2 species. 

 Ammonites varians. 



rotomagensis. 



Scaphites cequalis. 

 Baculites anceps ? 

 Turrilites costatus. 

 Hamites simplex. 

 Nautilus elegans. 

 carinatus. 



In addition to these we have obtained : — 



Ostrea canaliculata. 



carinata. 



Janira ceguicostata. 



Cardium, sp. 

 Ammonites cenomanensis. 

 Turrilites tuberculatus. 



The fauna really differs very little from that of the zone of 

 Ammonites Mantelli, except that in this locality some of the cepha- 

 lopoda, such as Ammonites rotomagensis and cenomanensis and 

 Scaphites cequalis, do not occur in the lower zone. Elsewhere, how- 

 ever — for instance, near Havre and in England — Scaphites cequalis 

 ranges to the very base of the Cenomanian. 



About 1J mile S.W. of Gace there is a large quarry where the 

 Corallian has been dug; a lane leads round its southern extremity, 

 and here there occurred a complete section through the Greensand 

 to the zone of Ammonites Mantelli as follows : — 



Feet. 



Rubble of chalk, cherts, and soil. 



Yellowish-grey, sandy, micaceous, glauconitic, siliceous 

 ' chalk ' (more than usually rusty-coloured, probably 

 much weathered ) 6-8 



A layer of hard, very glauconitic, siliceous, partly 

 crystalline masses 1 



Exceedingly glauconitic, green-grey, sandy marl, passing 

 d^wn to very dark, marly, glauconitic sand, almost 

 black at the base 9 



Corallian. 



Cenomanian. 



Upper 



Greensand. 



Ammonites Mantelli and A. navicularis occurred in the yellowish 

 4 chalk.' 



Near Mortagne, along a field-path leading from Mortagne to 

 Tillers, the Greensand was seen in several places as one passed over 

 the outcrop, but no section was found. 



Near the railway-station at Villers, in a ditch by the roadside 

 along the road towards Eiengs, it was constantly exposed. Eeturning 

 from Villers by the road which joins the high road from Paris to 

 Brest at La Jarretiere, Greensand was seen in the fields adjoining 

 the road, and at one point the plough had turned up many pieces 

 of the hard crystalline bed at its summit. 



