PLATE 14 



Gonyaulacysta hadra sp. nov. 

 Fig. 1. Dorsal surface of the holotype, V. 51731(1). The archaeopyle cover is within the 

 shell. X500. 



Gonaulacysta whitei sp. nov. 

 Fig. 2. Ventral surface of the holotype, PF. 3048(1). 



Gonyaulacysta cassidata (Eisenack & Cookson) 

 Fig. 3. Ventral surface of specimen PF. 3047(1), viewed by transparency. X500. 

 Fig. 4. Dorsal surface of same. x 500. 



Gonyaulacysta orthoceras (Eisenack) 

 Fig. 5. Ventral surface of specimen, V. 51730(3). X500. 

 Fig. 6. Dorsal surface of same, viewed by transparency. X500. 

 Psaligonyaulax deflandrei gen. et. sp nov. 

 Fig. 7. Ventral surface of the holotype, PF. 3049(1). X500. 

 Fig. 8. Dorsal surface of same, viewed by transparency. x 500. 



