7572 



YORKSHIRE TYPE AMMONITES 



LIII 



I'-ig. I 



Fig. I a 



Fig. lb 



Fig. 2 



ria. 3 



Ammonites trivialis, Simpson, 1843 



Whitby Museum, No. 105. Figs, i, Side, la, Peripheral, ib, Apertural 



views of Holotype; Figs. 2, 3, Side views of Paratypes 



' 



1. POLYMORPHITES TRIVIALIS, Simpson sp. 



2. Polyniorphites mixtus, Quenstedt sp. 



3. Polymorphites ju|)iter, d'Orbigny sp. 



