PLATE II. (continued). 



FIGS. PAGE 



10,11. Mytilus uiterihagensis sp. nov. ... ... ... ... ... 82 



10. Right valve. Cliff on Zoet Geneugd, Sunday's River (64h) ; 



11. left valve. Cliff below the old school-house, right bank of 

 Sunday's River, Dunbrodie (319); lla, flat antero-ventral sur- 

 face of both valves (319). 



12. Modiola baini Sharpe 85 



12. Left valve ; 12a, portion of surface in the lower part of the 

 valve, x 2. One mile north-east of Rawson Bridge, Zwartkop's 

 River (281). 



13. Nucula uiterihagensis sp. nov. ... ... ... ... ... 87 



Right valve. Wash-out 100 ft. above Coega station at a point 

 one mile north of Coega Hotel (441g). 



14. Grammatodon jonesi (Tate)... ... ... ... ... ... 88 



14. Left valve ; 14a, the same, x 2. Coega. 



15. Unio uiterihagensis sp. nov. 89 



15. Right valve ; 15a, frontal aspect. Bezuidenhout's River (323). 



