PLATE VI. 
Figs. 1. 2. Modiola maloniana sp. n. (p. 48). 
Side and profile views of the type specimen. 
Fig. .3. Modiola geniculata sp. n. (p. 19) . 
Figs. 4. 5. Mvtilus nuntius sp. n. (p. 48). 
Side and profile views of the type specimen. 
Vu,. 6. Akca dumbl] sp. n. (]). 51). 
Figs. 7. s. Arca taffii sp. q. (|i 50). 
Side and profile views of the type specimen. 
Figs. 9, 10. Cucull;ea ? texicostata sp. n. (p r>2). 
Fig. 9. The imperfect type specimen. 
Fig. 10. Portion of surface enlarged. 
Figs. 11, 12. Cucullea castilloi sp. n. (p 54). 
Side and profile views of the type specimen. 
Fig. 13. Leda ? navicula sp. n. (p. 55). 
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