EXPLANATION OF PLATE 34 



All figures natural size. 



Fig. la. Mulinia undilif era (Weaver) . Miocene. 

 Hinge of the type specimen. 



Fig. 16. Mulinia undilif era (Weaver). Miocene. 

 Exterior of the type specimen. 



Fig. 2. Mulinia undilifera (Weaver). Miocene. 



Fig. 3. Mulinia undilifera (Weaver) . Miocene. 



Fig. 4a. Mulinia pablocnsis, n. sp. Miocene. 



Fig. 4b. M ulinia pabloensis, n. sp. Miocene. 



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