PLATE 37, 



COCCODISCIDA. 



Fig. 1. Staurocyclia cruciata, n. sp., . 

 Fig. 2. Staurocyclia phacostaurus, n. sp., 

 Fig. 3. Staurocyclia* phacostaurus, n. sp., 



Vertical section through the centre. 



Fig. 4. Staurocyclia magniducis, n. sp. (Coccostaurus magniducis) , 



Fig. 5. Trigonocyclia triangularis, n. sp., 



Fig. 6. Stylocyclia prionacantha, n. sp., 



A great part of the peripheral shell is removed. 



Fig. 7. Amphicyclia arnphistyla, n. sp., . . . . x 300 464 



Vertical section through the centre- 

 Fig. 8. Stylocyclia excavata, n. sp., . . . . . x 200 463 



Vertical section through the centre. 





Diam. 



Page 



X 



400 



465 



X 



300 



465 



X 



300 



465 



X 



300 



466 



X 



.400 



464 



X 



500 



462 



