96 UNIVALVES. BUCCINUM. 



Nassa Ribbed. Fusca Tawny. 



DIVISION X. SHELL SPINOUS, OR RUGGED AND NODULOUS. 



Turbinellus Turbinated. Muricata Prickly. 



Capitellum Ridged. Ceramica Horned. 



Rhinoceros Rhinoceros. Globosa Globose. 



DIVISION XI. SHELL WITH A SOMEWHAT PRODUCED 

 BEAK. 



Pyrum Pear-shaped. Gravis Solid. 



Scolymus Artichoke. 



BUCCINUM. WHELK. 



Animal a Limax : Shell univalve, spiral, gibbous, aperture 

 ovate, terminating in a short canal, leaning to the right, 

 with a retuse beak or projection ; pillar-lip expanded. 

 THIS genus comprises one hundred and sixty-one spe- 

 cies, which are remarkable for their great beauty and va- 

 riety. The Buccinum may be distinguished from the G. 

 murex, (which it closely resembles), by its beak or canal 

 being usually much shorter, and inclining to the right in- 

 stead of the left; it is also generally more gibbous, which 

 is particularly the case with those species called tuns and 

 helmets. The tuns are for the most part of a brittle and 

 light fabric, and although some of them grow to a large 

 size, yet even then they retain their characteristic fragility 

 and thinness. 



The B. dolium, B. perdix, and the B. galea are the most 

 common species; the latter of which sometimes exceeds 

 ten inches in diameter. 



