180 CANCELLARIID^. 



outer lip greatly thickened in the middle and denticulated. E. 

 mendicaria, Lam, (Ivi, 91). 



Alcira, H. Ad., 1860. 



Bistr. — A. elegans, Ad. South Africa. 



Shell fusiform, thin ; spire produced ; whorls transversely 

 striated ; aperture ovate ; columella truncate, with a single oblique 

 fold anteriorly; outer lip thin, smooth internally, expanded at 

 the hind-part, and with the anterior margin crenulated. Differs 

 from other groups in its expanded lip, which is not thickened, 

 and from most others in the columellar fold. 



CoLUMBELLiNA, d'Orb., 1843. 



Syn. — Zittelia, Gremmellaro, 1810. 



Bistr. — 4 sp. Cretaceous ; France, India. C. ornata, d'Orb. 

 (Ivi, 92). 1 sp. Recent. 



Shell oval, thick, ventricose ; aperture narrow, flexuous, 

 narrowed in the middle, ending posteriorly in a prolonged lateral 

 canal ; outer lip much thickened and smooth within. 



COLUMBELLARIA, Rollc, 1861. 



Bistr. — Upper Jura; Europe. G. corallina, Quenst. (liv, 35a). 



Shell long-oval ; body-whorl rather inflated ; spire moderate ; 

 aperture wide below; outer lip rounded, not inflected in the 

 middle, with strong revolving ribs within ; columellar callus 

 thin, showing the sculpture of the body-whorl. 



Amphissa, H. and A. Ad., 1853. 



Bistr. — 2 sp. West Coast of North America. A. corrugata, 

 Rve. (Ivi, 93). 



Shell bucciniform, longitudinally ribbed ; spire elevated ; 

 aperture rather wide, enlarging below and terminating in a wide 

 anterior sinus; inner lip callous, plicate below; outer lip not 

 thickened on the margin, plicate within. 



Family CANCELLARIIDJa. 



Shell ribbed, cancellated by revolving lines ; mouth produced 

 or angulated in front ; columella plicated, outer lip ribbed within. 

 Teeth shaped somewhat like those of the family Conidse, arranged 

 in two rows ; the head does not seem to be elongated, the ros- 

 trum being rudimentary. There is no operculum. 



Cancellaria, Lam. 

 Etym. — Gancellatus, cross-barred. 



Bistr. — 10 sp. West Indies, Mediterranean, West Africa, 

 India, China, W. Coast of tropical America. Fossil, 60 sp. 



