Explanation of Plates. 



Figs. 5, 6. Astrotkamnus papillatus n. sp. 



Plate XXI. 



Figs. 1, 2. Coenopedina capensis n. sp. 

 Fig. 3. Coelopleurus interrupttis Doderl. 



Plate XXII. 

 Figs. 1, 2, 3. Paracentrotus grandis n. sp. 



Plate XXIII. 



435 



Upper and lower surfaces of 

 holotype, the latter enlar- 

 ged 3 times. 



Upper and lower surfaces of 

 holotype, enlarged 3 times. 

 Upper surface. 



Upper, lower and lateral 

 surfaces of holotype. 



Figs. 1, 2, 3. Spatagobrissus mirabilis n.g. and sp. Upper and lower surfaces of 



holotype. 1 natural size. 



