EXPLANATION OF PLATE VI 



(All figures magnified 29 diameters) 



Figure 1. — Bairdia victrix, G. S. Brady. Left valve. 



Figure 2. — Cythere normani, G. S. Brady. Right valve. 



Figure 3. — C. polytrema, G. S. Brady. Right valve. 



Figure 4. — Loxoconcha mawsoni, sp. n. Left valve : a, lateral aspect ; b, edge view. 



Figure 5. — Xestoleberis davidiana, Chapman. Type specimen. Left valve : a, lateral 

 aspect ; b, ventral edge view ; c, front end view. 



Figure 6. — X. davidiana, sp. n. Paratype. Right valve ; probably male example. 



Figure 7. — Cytherura costellata, G. S. Brady. Right valve. 



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