146 BOOK OF SPECIES. 



A. TUBERCULOSA. Large, involute, thin, 

 white ; the sides with tuberculiferous transverse 

 wrinkles ; the tubercles of the keels very promi- 

 nent and conic ; aperture wider in proportion than 

 the last. W. 13. 2. 



CARINARIA. 



Univalve, conical, compressed at the sides, uni- 

 locular, very thin, hyaline ; apex spiral ; back 

 sometimes ivith a dentated carina; aperture 

 oblong, entire. 



C. viTREA. W. Argonauta. 13. 6. 



THE END. 



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