100 UNIVALVES. BUCCINUM. 



DIVISION VI. SHELL WITH THE PILLAR-LIP DILATED AM 



THICKENED, AND APERTURE WIDE. 



FAMILY 1. With the pillar-lip much thickened and dilated. 

 Arcularia Broad-lipped. Verrucosum Warty. 



Coronatum Crowned. Gibbosulum Gibbous. 



*Hepaticum Small-knobV d. Clathratum Latticed. 

 Pullus Young. Ni veum Cancellated. 



Thersites Pale-olive. Lima Acuminated. 



FAMILY 2. With the pillar-Up spread, but not very thick. 

 Textum Ttirreted. Plicatulum Plaited. 



*Reticulatum Reticulated. Piscatorium Knobbed. 



*Ambiguum Small-plaited. Mauritii Six-toothed. 

 *Macula Spot-lipped. Armillatum Brawn. 



Stolatum Brown-banded. Nitidulum Thin-banded- 



Ventricosum Ventricose. 



FAMILY 3. Obtuse, convex, depressed, and smooth. 

 Neriteum Nerite- shaped. 



DIVISION VII. SHELL WITH LONGITUDINALLY KEELED, 



MUCRONATED RIBS, PILLAR SMOOTH. 



Harpa Harp. Crenatum Crenated. 



Cancallatum Latticed-harp. Costatum Many-ridged. 



DIVISION VIII. PILLAR-LIP APPEARING AS IF WORN FLAT, 



APERTURE VERY WIDE AND OPEN. 



FAMILY 1. Armed with a subulate tooth at the base. 

 Monodon One toothed Scoop. Narval Unicorn. 

 Irnbricatum Imbricated. Cingulatum Belted. 



Crassilabrum Thick- lipp'd. Rhinoceros Smooth. 



FAMILY 2. Without the tooth, and the outside striated. 

 Haustrum Scoop. SertwmChesnut. 



Persicum Persian. Vexillum Flag. 



FAMILY 3. With the outside tuberculated. 

 Patulum Wide-mouth 'd. tixmastoma Red-lipped* 



Luteostomum Pallid. Armigerum Armed. 



Dentex Toothed. 



