PLATE XXVII. 



PAGE. 

 N AUTII..US MONTGOMEHYENSIS Worthiin ],|js 



FiS 1. Dorsal view showing form of the septa. 



ASCOCERAS SOUTHWELL! Worthcn j-j 



Fi. 2. Side view natural size. 



Fig. -in. End view showing position of siphunele. 



TEMNOCHEILUS SCOTTENSE Worthen ^>\ 



Fig. S. Lateral view natural si,ze. 

 Fir. 3 (i. Profile view of same. 



