PLATE XXXI. 



PAOE 



PJg. 1. Fleurotomaria? tumida, M. and W 361 1a . c~JL - 



1 a. Side view, showing the form of the aperture. 



1 b. Opposite view. 



Pig. 2. Naticopsis nodosa, M. and W 366 



2 <i. SiJe view. 



2 /*. Opposite view, showing the aperture with the lip partly broken. 



Fig. 3. Naticopsis nodosa var. Hollidayi, M. and W 367 



:; i(. Side view, showing the aperture and flattened columella. 



3 4. View of opposite side. 



Fig. 4. Naticopsis nana, M. and W 365 



4 a. Side view, enlarged. 



4 b. View of opposite side, showing the aperture, which is too much 

 rounded within above, in the engraving. 



4 c. Natural size. 



Fig. 5. Macrocheilus medialis, M. and W 370 



6 a. Side view, natural size. 



5 b. View of opposite side, showing the aperture and transverse stride on 



the thickened inner lip. (The columella, and inner lip above it, are 

 shaded so as to appear too much as if flattened on a plane.) 



Fig. 6. Macrocheilus intercalaris, M. and W....1 371 



C a. Side view, natural size. 



6 b. View of opposite side, showing aperture. 



Fig. 7. Polyphemopsis peracuta, M. and W 375 



7 a. Side view. 



7 b. Opposite view, showing the aperture, with the lip broken. (The broken 



outer lip, which was merely restored in outline, is made to appear 

 unnaturally thickened below, by the shading in the engraving; and 

 the inner lip is carried too far up.) 



Fig. 8. Polyphemopsis inornata, M. and W 374 



8 a. Side view, enlarged, showing the aperture, with the lip broken. 

 8 b. Opposite view. 



8 c. Natural size. 



Fig. 9. Polyphemopsis nitidula, M. and W 374 



9 a. Side view, showing the aperture, with lip broken. 

 9 b. View of opposite side. 



Fig. 10. Loxoxema scitula, M. and W 377 



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



10 b. View of opposite side. 



10 c. Natural size. 



Fig. 11. Loxonema rugosa, M. and W.... .178 



11 a. Enlarged side view. 



116. Opposite side of same, showing aperture, with lip somewhat broken. 

 11 c. Natural size. 



