Fig. 2. — Sutural development of Liparoceras sparsicosta. 



S 



23 mm. 



f 

 mm. 



e 

 5 mm. 



d 

 2-2 mm. 



c 

 3rd. 



b 

 2nd. 



a 

 1st. 



[g = L. Richardson Coll., figured in PI. XXI, fig. 2 a.] 



Fig. 3. — Sutures 0/ Beaniceras spp. (Napton), 



b 

 5 mm. 



a 



22 mm. 



