PLATE 13 



Gonyaulacysta gongylos sp. nov. 

 Fig. 1. Ventral surface of holotype, V. 51708(1). X500. 

 Fig. 2. Dorsal surface of holotype viewed by transparency. X500. 



Gonyaulacysta palla sp. nov. 

 Fig. 3. Ventral surface of holotype, V. 51718(2). X500. 

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



Gonyaulacysta aichmetes sp. nov. 

 Fig. 5. Ventral surface of holotype, V. 51730(2). X 500. 

 Fig. 6. Dorsal surface of holotype. X500. 



Gonyaulacysta helicoidea (Eisenack & Cookson) 

 Fig. 7. Ventral surface of specimen, V. 51718(1). X500. 

 Fig. 8. Dorsal surface of same, viewed by transparency. X500. 



Gonyaulacysta episoma sp. nov. 

 Fig. 9. Ventral surface of holotype, V. 51730(1). 

 Fig. 10. Dorsal surface of holotype, viewed by transparency. X500. 



Gonyaulacysta axicerastes sp. nov. 

 Fig. 11. Ventral surface of holotype, V. 51727(1). X500. 

 Fig. 12. Dorsal surface of holotype, viewed by transparency. X500. 



