391 



Lower Ammonites Margaritatus Beds. 



We may now resort to less familiar names ; one who was a 

 fellow labourer, and to whom both Qtjenstedt and OppEii owe 

 much, M. Ppizenmatee, describes three subdivisions, which we 

 also annex for the Lias of South West Germany. (Wiirtemb. 

 naturwiss. Jahrb. 1856, p. 109.) 



(S. W, GERMANY.) 



Horizon 

 of 



Ammonites 

 Spinatus. 



Margaritatus 

 Beds. 



Petrology. 



1. Marly Limestone, 

 of a light colour. 



Fossils. 



Ammonites spinatus, Belemnites breviformis, 

 Spirifer. rostratus, Spirifer. verrucosus, Tereb. 

 punctata. Ter. subdigona, Rhyn. quinquepUcata. 



Am. margaritatus gigas, A. Englehardti, A. 

 heterophyllus, Bel. elongatus, B. compressus, 

 B. acuarius, Scalaria liassica, Pecten glaber, 

 Pentac. basaltif ormis. 



A German authority, meritoriously of great weight for 

 sound knowledge and application, was the late U. Schlonbach, 

 who has with much care and painstaking, correlated the North 

 German Lias, and incorporated the deductions in an excellent 



