1928 



TYPE AMMONITES— VII 



I)( I LXIIb 



Fig. i 



Fig. 2 



Ammonites birchi gigas, Quenstedt 

 Lyme Regis, Dorset ; Lower Lias ; S.B. Coll. 4732 

 Transverse (concrescent) striae with punctae and short, intermittent, 

 irregular longitudinal striae on test 



MICRODEROCERAS GIGAS, Quenstedt sp., 1883 

 Microderoceratan, birchi. Cf. DCCY1 



