24 



THE LIAS AMMONITES. 



many of them were figured and described by Dr. Dunker in the ' Palseontographica' 

 some years ago. 



Cephalopoda. 



Aegoceras planorbis, Sow. 



— Johnstoni, Soiv. 



— Hagenovii, Dukr. 



Cylindrites fragilis, Dukr. 

 Patella Schmidtii, Dukr, 



— subquadrata, Dukr. 



— tenuis, Dukr. 

 Dentalium Etalense, Terq. 

 Pleurotomaria rotellseformis, Dukr. 

 Discohelix pygmseus, Dukr. 

 Euomphalus liasinus, Dukr. 

 Neritina Hasina, Dukr. 



Aegoceras angulatum, Schloth. 



— laqueum Qucnst. 

 Nautilus intermedius, Sow. 



Gasteropoda. 



Turritella Zenkeni, Dukr. 

 Hydrobia Krausseana, Dukr. 



— solidula, Dukr. 

 Hydrobia subulata, Dukr. 

 Rissoa Hasina, Dukr. 

 Littorina inornata, Terqm. 

 Cerithium gratum, Terqm. 



— Etalense, Piette. 

 Purpurina angulata, Dukr. 



Lamellibranchiata. 



Ostrea snblamellosa, Dukr. 



— ungula, Munst. 

 Hinnites inaequistriatus, Gold/. 

 Pecten textorius, Schloth. 

 Lima pectinoides, Sow. 



— succincta, Schloth. 



— gigantea, Sow. 

 Nucula navis, PietteS 

 Macrodon pullus, Terqm. 

 Inoceramus pinnseformis, Dukr. 

 Gervillia Hagenovii, Dukr. 

 Avicula Kurrii, Oppel. 



Pinna Hartmanni, Ziet. 

 Modiola Hillana, Sow. 



— nitidula, Dukr. 



— scalprum, Sow. 

 Astarte obsoleta, Dukr. 



Cardinia concinna, Sow. 

 ■ — crassiuscula, Soiv. 

 — Listeri, Sow. 

 Hippopodium ponderosum, Sow. 

 Unicardium cardioides, Phill. 

 Cardium Heberti, Terqm. 

 Protocardia Phillippiana, Dukr. 

 Isodonta elliptica, Dukr. 

 Tancredia securiformis, Dukr. 

 Cyrena Menkei, Dukr. 



— Germari, Dukr. 

 Tseniodon ellipticus, Dukr. 

 Pholadomya corrugata, Dukr. 

 Goniomya beteropleura, Agass. 

 Gresslya Galatbea, Agass. 

 Pleuromya subrufosa, Dukr. 

 — Hasina, Schiibl. 



The Planorbis-beds are developed in Wiirttemberg, and exposed near Stuttgart; 

 at Uiidern smooth forms of Aegoceras planorbis lie in a dark crystalline limestone ; and 

 at Nellingen, the smooth and plaited varieties of the same species are found together in 

 a dark-grey limestone. 



In Swabia they are likewise worked, and from them a fine series of Ammonites have 

 been collected by Professor Quenstedt, which are contained in the Tubingen University 



