RIDDULPHIA. 



467 



Fig. 197. Bindulphia pulchella. 

 a. Valve view. />. Girdle view, 



(Wi 



3oo 



Fig. 198. B. (Triceratium J con si mi h 



Fig. igg.B. ( Triceratium J ShadbolUanum. 



a. Valve view. b. Girdle view. 



Fig. 200, B. (Zygoteros) 

 concinnus. 



a - b. 



Fig. 201. B. (Deniicella) gramdata. 



a. Girdle view. b. Valve view. 



