DALL, TERTIARY MOLLUSKS OF FLORIDA, PART I. 



PLATE I. 



Note. — The figures immediately preceding the page-reference represent the actual 

 length in millimeters of the longest dimension of the specimen as seen in the figure, unless 

 otherwise specified. The drawings having been made at various times, it has happened 

 that the real size of the specimens bears no constant relation to the size of the figures repre- 

 senting them, and a smaller species may be represented by a larger figure than that of 

 some other actually larger species. The numerals in the explanation, therefore, give the 

 exact length of the greatest dimension, whether breadth or height, enabling the sizes to be 

 compared without having to refer back to the various descriptions in the text. 



Figs. I, I a. Helix Diespiter Dall ; iS.o ; p. lo. 



Figs. 2, 2a. Helicina ballista Dall ; lo.o ; p. 3. 



Fig. 3. Lioplax ftoridana Dall ; 7.5 ; p. 3- 



Figs. 4, 4 a, 4 b. Helix crusta Dall ; fragment ; p. g. 



Figs. 5, 5 a. Helix adamnis Dall ; 9. i ; p. 12. 



Fig. 6. Strophia anodonia V3.r. floiidana TiaW; 22.0; p. 13, 



Fig. 6 a. Cylindrella floridana Dall ; 11. 5 ; p. 13. 



Fig. 6b. Bulimulus Heilprinianus Dall; last whorl much enlarged ; p. 6. 



Figs. 6 c, 6d. Planorbis Willcoxii ; 6.5 ; p. 4. 



Figs. 6 e, 6 f. Helix crusta Dall ; 15.0 ; p. 9. 



Fig. 7. Helix instrmnosa Dall ; 135; p. 9. 



Figs. 7 a, 7 b. Helix direpta Dall ; 15.0 ; p. 10. 



Figs. 7 c, 7 d. Helix haruspica Dall ; 24.0; p. 11. 



Figs. 8, 8 a. Helix latebrosa Dall ; alt. 12.0 ; diam. 16.0; p. 8. 



Fig. 8 b. Helix instricmosa Dall ; 13.5 ; p. 9. 



Figs. 8 c, 8d. Strophia anodonta Dall ; 24.0; p. 13. 



Figs. 9, 9 a. Bulimulus a niericaims 'Da.W; 17.0; p. 7. 



Fig. 10. Btdimulus Heilprinianus Dall ; 11. o ; p. 6. 



Fig. II. Bulimulus Jloridanus Conrad ; lo.o ; p. 5. • 



Fig. 12. Bulimulus Steaj-nsii'DsW; 13.0; p. 7. 



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