PLATE XXVIII. 



PAGK 



Fig. 1. Pi.kurotomaria Brazoensis, Shumard? 354 l.Cu-***4 



1 a. Side view, a little enlarged, showing aperture. 



1 b. Opposite side of same. 



1 c. Natural size. 



1 d. Enlarged diagram of surface markings. 



Fig. 2. Pleurotomaria granulo-striata, M. and W 356 J.fo^-wJ 



2 a. Side view, enlarged, showing the aperture. 

 2 b. Opposite side of same. 



2 c. Natural size. 



2 d. Enlarged diagram of surface markings. 



Fig. 3. Pleurotomaria tenuicincta, M. and W 355 U-C~l~ »^*4 



3 a. Side view, enlarged. 



3 b. Opposite side of same, showing (imperfectly) the aperture. 



3 c. Natural size. 



3 d. Enlarged diagram of surface markings. 



Fig. 4. Pleurotomaria subsinuata, M. and W 358 J-.CnJ,- 



4 a. Side view, enlarged, showing the aperture. 

 4 b. View of the opposite side of the same. 

 4 c. Enlarged diagram of surface markings. 



4 d. Natural size. 



Fig. 5. Pleurotomaria speciosa, M. and W 352 J..CU- 



5 a. Side view, natural size. 

 5 b. Opposite view of same. 



5 c. Enlarged diagram, showing the surface markings. 



Fig. 6. Pleurotomaria subconstricta, M. and W 351 <^> CU-* 



6 a. Side view, magnified^ and showiug the aperture. 

 6 b. Opposite side of same. 

 6 c. Natural size. 



6 d. Diagram, enlarged, showing the surface markings, spiral band, etc. 



Fig. 7. Pleurotomaria Pratteni, M. and W 357 X.CWt-' 



7 a. Side view, enlarged, showing the aperture and the sinus in the lip. 

 7 6. Opposite side. 

 7 c. Natural size. 



7 d. Enlaiged diagram of surface markings. 

 Fig. 8. Pleurotomaria turbiniformis, M. and W 359 1^> C*A- 



8 a. Side view, natural size. 

 8 b. Opposite view of same. 



8 c. Diagram showing enlarged surface markings. 



Fig. 9. Pleurotomaria scitula, M. and W 353 «*> dmX- *«« 



9 a. Side view, enlarged, showing the aperture. 

 9 b. Opposite view of same. 



9 c. Diagram showing surface markings and spiral band. 



9 d. Natural size. 



Fig. 10.* Pleurotomaria subscalaris, M. and W 360 ^*Co^~\* 



10 a. Side view. 



10 b. View of opposite side, both natural size. 



* The error in the numbering of the figures of this specie?, mentioned on p. 300 of the text, wag after- 

 wards corrected on the plate. 



