24 



THE LIAS AMMONITES. 



many of them were figured and described by Dr. Danker in the ' Palaeontographica' 

 some years ago. 



Cephalopoda. 



Aegoceras planorbis. Sow. 



— Johnstoni, Sow. 



— Hagenovii, Bukr. 



Cylindrites fragilis, Duh: 

 Patella Schmidtii, Bukr, 



— subquadrata, Bukr. 



— tenuis, Bukr. 

 Dentalium Etalense, Terq. 

 Pleurotomaria rotellseformis, Bukr. 

 Discohelix pygmeeus, Bukr. 

 Euomphalus liasinus, Bukr. 

 Neritina Hasina, Bukr. 



Aegoceras angulatum, Schloth. 



— laqueum Querist. 

 Nautilus intermedius, Sow. 



Gasteropoda. 



Turritella Zenkeni, Bukr. 

 Hydrobia Krausseana, Bukr. 



— solidula, Bukr. 

 Hydrobia subulata, Bukr. 

 Rissoa liasina, Dukr. 

 Littorina inornata, Terqm. 

 Cerithium gratum, Terqm. 



— Etalense, Piette. 

 Purpurina angulata, Bukr. 



Lamellibranchiata. 



Ostrea snblamellosa, Bukr. 



— ungula, MUnst. 

 Hinnites insequistriatus, Goldf. 

 Pecten textorius, Schloth. 

 Lima pectinoides, Sow. 



— succincta, Schloth. 



— gigantea, Sow. 

 Nucula navis, Piette.] 

 Maerodon pullus, Terqm. 

 Inoceramus pinnseformis, Bukr. 

 Gervillia Hagenovii, Bukr. 

 Avicula Kurrii, Oppel. 



Pinna Hartmanni, Ziet. 

 Modiola Hillana, Sow. 



— nitidula, Bukr. 



— scalprum, Sow. 

 Astarte cbsoleta, Bukr. 



Cardinia concinna. Sow. 



— crassiuscula. Sow. 



— Listeri, Sow. 

 Hippopodium ponderosum, Sow. 

 Unicardium cardioides, Phill. 

 Cardium Heberti, Terqm. 

 Protocardia Phillippiana, Bukr. 

 Isodonta elliptica, Bukr. 

 Taneredia securiformis, Bukr. 

 Cyrena Menkei, Bukr. 



— G-ermari, Bukr. 

 Tseniodon ellipticus, Bukr. 

 Pholadomya corrugata, Bukr. 

 Goniomya heteropleura, Agass. 

 Gresslya Galathea, Agass. 

 Pleuromya subrufosa, Bukr. 

 — liasina, Schiibl. 



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

 at Riidern 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 Tiibingen University 



