130 



THE LIAS AMMONITES. 



cormuSj Thrissops, Leptolepis. Saurians, as IcJdhyosaurus, Plesiosaurus, and Teleosaurus. 

 Cephalopods, as Harpoceras serpentinum, bifrons, Lythense, Phylloceras Jteterophyllum, 

 Lytoceras cornucopia, Belemnites acuarius. Lamellibranchs, as Inoceramus dubius, 

 Posidonia Bronni, Minotis substriatus, Leda ovum ; and Brachiopods, as Discina reflexa^ 

 and others. ^\iQ " Jurensis-MergeV is characterised by the absence of Fish remains 

 and the appearance of a new suite of Cephalopods, as Lytoceras jurense, Harpoceras 

 insigne, variabile, striatulum, radians^ Aatense^ and many others. 



At Pliensbach, north-west of Boll, and Holzmaden, south-west of Kirchheim, the 

 following section by Dr. Oppel may be considered as typical of the Wiirttemberg Upper 

 Lias. 



Upper Lias near BoU^ Wiirttemberg. 

 Torulosus-bed. 





Petrology. 



Thick- 

 ness. 



Organic Remains. 



Zone of 



Lytoceras 



JUUENSE 



Zone of 

 posidonomya ■< 

 Bkonni 



Two or three light grey, 

 hard, marl beds, with 



clays between 8 to 



' EflBorescent slaty shales, re- 

 placed in many places by 

 the so-called "Leberboden" 



Monotis bed 



ft. 



10 



8 

 

 







1 







1 







2 







5 

 

 





 1 



in. 









 2 



2 



5 

 



8 

 

 4 







8 







8 

 2 



3-5 

 6 



Am. jurensis, discoides, insignis, radians, hir- 

 cinus, Belemnites tricanaliculatus, exilis, 

 longisulcatus, irregularis. 



Am. hifrons, Jibulatus, serpentinus, falcifer, 

 heteropJiyllus, cornucopice, communis, crassus, 

 Holandrei, subarmatus, Bel. irregularis, Bel. 

 tripartitus. 



Monotis substriatus, Miinst. 



Belemnites acuarius. 



Teleosaurus Chapmani, Pterodaetylus Ban- 

 thensis, Ptycholepis Bollensis. 



Posidonomya, Bronni, Monotis substriatus. 



Leptolepis Elvensis. 



Saurians, Pentacrinus Bollensis. 



Spiriferina villosus, Belemnites papillatus. 

 Saurians and Sepiee. 

 Acrosalenia crinifera, Quenst. 



Slaty beds, abounding with 

 saurian and fishes' remains 



Slaty beds with Teleosaurus, 

 Pterodactyle, and fishes' 

 remains 



Light-grev slaty clav 



Upper " StinAstein " 



Slateswithfishesand saurians 

 Hard laminated clay... 2 to 

 Light efllorescent laminated 



slates 



Lower " Stinkstein," with 



fishes' remains 



Laminated slates, with 

 Geodes 



"Fleins" 



Ilainzen TpyriUc ae^ts 



Bluish-grey clay, with Algae 

 Blackish fafeljieins 



^ ''AlgcescliichV 



The Middle Lias. — Zone of Am. spinafus.^ 



' ' Juraformation,' p. 201, 185C. 



