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the Top. One of the Extremities of this 

 Shell is of a pyramidical Figure, the other 

 formed into high Ribs which conftitute 

 a deprefled Clavicle, or a dentated Crown ; 

 the Head is feparated from the Body of 

 the Shell by a high Rib. Among the 

 Specimens are the Admiral, Vice -Admi- 

 ral, Tyger Shells, Hebrew Letters, the 

 Onyx Shell, many coronated Volutes, and 

 feveral Kind of Leopard Shells. 



Forcellmia^ Porcellain Shells. The Por- 

 cellana is of a conglobated oblong gib- 

 bofe or umbonated Form, and has for a 

 Mouth or Aperture, a long and narrow 

 Slit, dentated on each Side. A few of 

 the moil curious of this Kind are, the 

 Arabian Letter Shell, the Map Shell, the 

 Argus, and Falfe Argus, the Tortoife Por- 

 cellain, the Beetle, the Chinefe and Boat 

 Porcellain, the Atlas Porcelain, MolePor- 

 cellains, and one Specimen of that Kind 

 called the Weavers Shuttle. The com- 

 mon Cowries, or Guinea Money, come 

 vinder this Title. 



Nautili^ 



