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and Omnipotent has taught them to compose, the beautiful shells, in which, 

 recluse and buried, yet still alive, they form those excellent threads, when 

 not destroyed by men, who clothe and adorn themselves, with the labor of 

 these industrious creatures, and are proud of wearing such inglorious spoils. 



The number of this species at present known, are twenty-one, and are in 

 two divisions. 



DIVISION I. Shell longitudinally ribbed. 



Scientific name. 



Locality. 



Scientific name. 



Locality. 



Rudis, 



Med., So. & Asiat. Seas. 



Adusta, 



So. Seas, Manilla. 



Pectinata, 



Coromandel, Britain. 



Vexillum, 



East Indies. 



Inflata, 



Nicobar Isles. 



Squamosa, 



Mediterranean. 



Carnea, 



Dorsetshire, W. Indies. 



Vitroa, 



East Indies. 



Rio-ida, 



Curacoa. 



Papyracea, 



do. do. 



Nobilis, 



Med. and Adriatic Seas. 



Saccata, 



Indian Ocean. 



Muricata, 



do. and East Indies. 



Cancellata, 



Ceylon. 



Nigra, 

 Ing-ens, 

 Rotundata, 

 Bicolor, 



DIVISION II. Shell nearly smooth and plain. 



South Seas, Amboyna. 

 Hebrides. 

 Mediterranean. 

 Red Sea. 



Incurva, 



Digitiformis, 



Lobata, 



Amboyna. 

 Indian Ocean, 

 do. do. 



