164 BULLETIN 90, UNITED STATES NATIONAL MUSEUM. 



Fig. 4. Liotia {Arene) solurlella Heilprin, view of upper surface, lat. .j.S mm., 

 p. 112. 



5. The same in profile. 



6. Liotia coronata Dall, upper surface, lat. 5 mm., p. 112. 



7. Hipponix wiUcoxii Dall, Ion. of base, 9 mm., p. 104. 



8. Vivipara (Lioplax) floridana Dall, alt. 7.5 mm., p, 100. 



9. MargineUa bcllula Dall, alt. 6.5 mm., p. 53. 



10. MargineUa hcUa Conrad, alt. 8 mm., p. 55. 



11. MargineUa eleganUda Dall, alt. 11 mm., p. 53. 



12. MargineUa baUista Dall, alt. 18 mm., p. 54. 



13. MargineUa neivmani Dall, alt. 5.5 mm., p. 57. 



14. MargineUa faunula Dall, alt. 8 mm., p. 53. 



15. Tegula exoleta Conrad, lat. 12 mm., p. 111. 



16. The same, basal view. 



17. Liotia coronata Dall, lat. 5 mm., p. 112. 



Plate 17. 



Fig. 1. Cardita (Carditamera) tcgea Dall, Ion. 33 mm., p. 133. 



2. Corbula sarda Dall, Ion. 12 mm., p. 155. 



3. TeUina segregata Dall, Ion. 17 mm., p. 151. 



4. Area (Barbatia) irregularis Dall, Ion. 52 mm., p. 119. 



5. Area (Barbatia) arcula Heilprin, Ion. 47 mm., p. 120. 



6. Area umbonata Lamarck, left valve from above. Ion. .36 mm., p. 118. 



7. Area {SeapJiarca) hypomela Dall, Ion. 50 mm., p. 121. 



8. Area nmbonata Lamarck, interior of left valve. Ion, 50 mm., p. 118. 



9. ViUorita floridana Dall, view of hinge of right valve, alt. 70 mm., p. 134. 



10. The same, profile view, diem. 25 mm. 



11. TeUina segregata Dall, from above. Ion. 17 mm., p. 151. 



Plate 18. 



Fig. 1. Panope uhitfieldi Dall, Ion. 88 mm., p. 156. 



2. Panope whitfieldi Dall. 



3. CaUocardia nux Dall, Ion. 14 mm., p. 147. 



4. Corbula burnsi Dall, Ion. 11 mm., p. 155. 



5. Corbula burnsi Dall. 



6. Bornia tampae Dall, Ion, 6 mm., p. 141. 



7. Cardiuni {Traehpcardium) propeciliare Dall, Ion. 20 mm., p. 142. 



8. ViUorita floridana Dall, alt. 70 mm., p. 134. 



9. Diplodonta catopotimn Dall, Ion. 8 mm., p. 140. 



10. ViUorita floridana Dall, alt. 70 mm., p. 134. 



11. ViUorita floridana, showing the hinge of the right valve, lat. 65 mm. 



Plate 19. 



Fig. 1. Spondi/lus ehipolanus Dall, young valve, alt. 30 mm., p. 125. 



2. Oastrochaena rotunda Dall, Ion, 7 mm., p. 157. 



3. Cardiuni (Cerastodertna) taphrium Dall, Ion. 35 mm., p. 144, 



4. Spondylus bostrychites Guppy, alt. 59 mm,, p. 124. 



5. Phaeoides hillsborocnsis Heilprin, alt. 60 mm., p. 139. 



6. Ostrea raughani Dall, Ion. 120 mm., p. 123. 



