140 



ME. H. ETNASTON ON THE 



[May 1894, 



Upper Chalk with BeUmnitella mucronata of Northern Germany 

 and Northern France we find 18 species, amongst which are : — 



Pecten Imvis (Nilss.). 



virgatus (Nilss.). 



cretosus. 



membranaceus (Nilss.). 



Janira quadricostata (Sow.). 



substriatocostata (Sow.). 



Ostrea vesicularis (Lam.). 



Cardium productum (Sow.). 

 Trigonia limbata (d'Orb.). 

 Pinna cretacea (Schl.). 

 Gervittia solenoides (Defr.). 

 Inoceramus Cripsi (Mant.). 



Lamarcki (Park.). 



latus (Mant.). 



Lima decussata. 



In the sub-stage Campanien we find 13 species. 



„ „ Angoumien „ 7 „ 



„ „ Mornasien „ 15 „ 



„ „ Provencien „ 15 „ 



Out of the 15 Provencien species 7 are only found elsewhere 

 in the Gosau Beds, and these 7 are all Rudistce, namely : — 



Hippurites comu-vaccinum 

 (Bronn). 



■ sulcatus (Defr.). 



Toucasianus (d'Orb.). 



Hippurites dilaiatus (Defr.). 



organisans (Montf.). 



Sphwrulites angeiodes (Pic. de Lap.). 

 Caprina Aguilloni (d'Orb.). 



These are, of course, extremely characteristic and common, and 

 belong to the most characteristic forms of the zone of Hippurites 

 comu-vaccinum, which forms one of the best-marked horizons in 

 the Cretaceous system. Zittel concludes from his study of the 

 distribution of the Gosau lamellibranchs " that the Gosau Beds 

 belong to the zone- of Hippurites comu-vaccinum or Etage Pro- 

 vencien (Coquand), and do not represent the Turonian and Senonian 

 combined." He finds that this conclusion is also supported by the 

 facts of the distribution of the gasteropoda and corals. Of the 

 brachiopoda none are restricted to any definite horizon. Thus, out 

 of the 8 species known, we find : — 



2 in tbe Neocornian and Gault. 

 5 „ Cenomanian. 



Planerkalk. 



Lower Obalk. 



Santonian. 



Upper Chalk with BeUmnitella mucronata. 



Stoliczka reduced the gasteropoda described by Zekeli from 

 nearly 200 species to about 124. By far the larger majority of 

 these are confined to the North-eastern Alps, only a small number 

 occurring in the South of France. Out of the 26 species which 

 occur outside the Eastern Alps we get, according to Zittel, 21 in 

 the Provencien, of which 14 occur in the blue marls of Corbieres. 

 Among them we may mention : — 



Act&onella gigantea (Sow.). 

 Volvulina Icevis (d'Orb.). 

 Nerincea Buchi (Kefst.). 

 Omphalia Kefersteini (Munst.). 



Renauxiana (d'Orb.). 



Ampullina {Satica) bulbiformis 



(Sow.). 

 Natica lyrata (Sow.). 

 angulata (Sow.). 



Fusus cingidatus (Sow.). 

 Alaria costata (Sow.). 



granulata (Sow). 



Astralium radiatum (Zek.). 

 Phasianella gosauica (Zek.). 

 Cerithium furcatum (Zek.). 



reticosum (Sow.). 



provinciate (d'Orb.). 



