UNIVALVES. — BUCCINUM. 99 



Division IV. — Shell with an exserted reflected beak, 



PILLAR-LIP spread, AND THE OUTER LIP 

 UNARMED OUTWARDLY. 



Family 1. — With the spire truncated, aperture rather linear, 

 pillar-lip much spread, the pillar slightly ivrinkled, and outer 

 lip thickened. 



Cornutum — Wrinkled Helmet. Flammeum — Triangular. 



Plicatum — Plaited. Rufum — Red. 



Tuberosum-Zfc-2:ff^. Testiculus — Purse. 



Family 2. — With the spire rather elevated, pillar-lip thinly 



spread, pillar slightly wrinkled, and outer Up thickened. 

 Decussatum — Decussated. Strigatum — Yellow-striped. 



Areola — Draft-board. Saburon — Grey. 



Abbreviatum — Shortened. 



Family 3. — Resembling the second, except having the pillar-lip 



granulated. 

 Granulatum — Granulated. Undulatum — Undulated. 



Family 4. — Resembling the third, but having tlie pillar-lip granu- 

 lated and wrinkled. 

 Inflatum — Inflated. * Bilineatum — Smooth-net. 



Tessellatum — Tessellated. Cicatricosum — Cicatrix. 



Family 5. — With the pillar-Up smooth. 

 Recurvirostrum — Recurved beak. Cassis — Helmet. 



Division V. — Shell resembling the last division, but 



THE outer lip, ON THE OUTSIDE, IS MURICATED 

 AT THE BASE. 



Family 1. — With the spire short. 

 Erinaceus — Hedgehog. Fimbria — Bordered. 



Biarmatum — Knobbed. Glaucum — Yellow. 



Vibex — Agate. 



Family 2. — With the spire elevated. 

 Papillosum — Prickly -lip. Mutabile — Changeable. 



Glans — Thread-girded. Gibbum — Hunchbacked. 



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