PLATE XXVIII. 



Fig. i. Liicina (Milthd) caloosaensis Dull, right valve ; 55 mm. ; Pliocene. 



Fig. 2. Diplodonta acclinis Conrad, interior of right valve ; from the Caloosahatchie 



beds ; 23 mm. 



Fig. 3. Lima caloosana Dall ; 33 mm. ; p. 767. 

 Fig. 4. 'Mulinia caloosaensis Dall, profile ; 22 mm. ; p. 902. 

 Fig. 5. Spisula marylandica Dall, interior of right valve ; 92 mm. ; p. 897. 

 Fig. 6. Mulinia CdlooSO/insis Dall, dorsal aspect ; 22 mm. ; p. 902. 

 Fig. 7. Mulinia sapotilla Dall, interior of an elevated young right valve ; 18 mm. ; 



p. 880. 



Fig. 8. Mitlinia sapotilla Dall, dorsal aspect ; 12 mm. ; p. 902. 

 Fig. 9. Mulinia sapotilla Dall, interior of adult left valve, showing elongation ; 29 



mm. ; p. 880. 



Fig. 10. Mactra (Afyctrotoma) //'///< vuv'/ Dall, interior of right valve ; 45 mm. ; p. 894. 

 Fig. n. Mactra (Mactivtoma) M'illcoxii Dall, exterior of left valve ; 45 mm. ; p. 894. 

 Fig. 12. Mactra (Aficromac(ra) undula Dall, interior of left valve ; 42.5 mm. ; p. 893. 

 Fig. 13. Diplodonta acclinis Conrad, exterior of right valve ; 23 mm. 

 Fig. 14. Mulinia sapotilla Dall, exterior of valve figured above at fig. 7 ; 18 mm. ; 



p. 902. 

 Fig. 15. Afactra multilineata Dall, exterior of left valve ; from the Caloosahatchie beds ; 



49 mm. 



Fig. 16. Donax 1-jiimonsi Dall, 1892; Miocene of North Carolina ; profile; 10 mm. 

 Fig. 17. Donax aqtrilibrata Dall, 1892 ; Miocene of North Carolina ; profile ; 18 mm. 



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