164 T. Davidson — On Continental Geology. 



systems generally, and especially to those divisions so largely 

 developed in the South of France, and during my passage through 

 Marseilles he kindly vs^rote out the following table, in which his 

 views are correctly defined. 



I. Upper Chalk. 



1. Garumnien (Leymerie), named after the department of the 



Garonne — 



SphcBruUtes Leymerii (Bayle), Cyrena garumnica, Lychnus Matheroni. It is' of 

 fresh-water origin in Provence, and fluvio-marine in the Pyrenees. It comprises 

 the Pisolitic stage of d' Orbigny. Mr. Leymerie places it on a parallel with the 

 etage Danien, hut I believe this to be a mistake. It does not exist in England. 



2. DoRDONiEN (Coquand), after the department of Dordogne — 



SphceruUtes inffens, Sippurites radiosus, Radiolites Joufznneti, Ostrea Villei, etc. 

 It includes the upper beds of Maestricht which contain the same Rudists as in the 

 Dordogne. It also comprises the S^nonien of d 'Orbigny (upper portion), and is 

 wanting in England. 



3. Gampanibn (Coquand) , from the country of Champaign or Cognno — ■ 



Ostrea vesicularis, Belemnitella mucronata, Tcrebratula earnea, Ananchytes ovatus, 

 Hemipneustes radiatus, Baculites Faujasi, Radiolites Hceninghausi. It corresponds 

 to the Senonien of d' Orbigny : to the Danien of the same author, who, by mistake, 

 identifies it with the Pisolitique : it is the White Chalk of the English, the Craie 

 blanche de Meudon of the French ; the Obere Kreide of the German Geologists. 



4. Santonien (Coquand), from Saintonge — 



Micraster cor-anguinum, Belemnitella quadrata, Spondylus truncatus, Ehynchonella 

 vespertilio, Ostrea semi-plana, 0. frons Radiolites Jissicostatus. It corre- 

 sponds to the Senonien of d'Orbigny : to the upper portion only of the Lower 

 Chalk, to the Craie Marneuse, and Craie de Velledieu; to the Oberer Planer of 

 the Germans. 



5. CoNiAciEN (Coquand), from Cognac — 



Ehynchonella Baugasi, Sphosrulites Coquandi. It corresponds to the base or 

 lower portion of the Senonien of d'Orbigny: to the Sables d'Aix-la-Chapelle 

 (base), and is not found in England. 



II. Middle Chalk, 



1. Provencien (Coquand) after the Provence — 



Sippurites cornu-vaccinum, S. organisans, SphceruUtes Sauvagesi, S. angeiodes, 

 Gaprina Coquandi. It corresponds to the Turonien of d'Orbigny. 



2. MoRNASiEN (Coquand), after Mornas Vaucluse — 



Ammonites Requieni, Area Matheroni. It comprises the celebrated Gres 

 d'Uchaux (Turonien of d'Orbigny), and is wanting in England. 



3. Angotjmien (Coquand), after Angouleme — 



Radiolites cornu- pastor is, R. lumbricalis, Hippurites Requiem. Is wanting in 

 England, but corresponds to the Turonien of d' Orbigny. 



4. LiCERiEN (Coquand), after the Loire — 



Inoceramus problsmaticus, Ammonites Fleurianiis, A. papalis, Terebratella Caren- 

 tonensis. It corresponds to the lower portion of the Lower Chalk of England, to 

 the base of the Craie Marneuse: to the Craie Tuffeau, to the Turonien of d'Or- 

 bigny: Mittler Quadermergel, Planerkalk of the Germans. 



5. Carentonien (Coquand), after the department of the Charente — 



Caprina adversa, SphceruUtes Joliaceus, Ostrea biaurieulata, 0. columba, O.Jla- 

 lellata, Terabratula phascolina. It corresponds to the Ceuomanien of d'Orbigny : 

 to the Sables du Mans, Chalk Marl of English geologists, Uuterer Planer of the 

 Germans. 



