282 C O N C H O L O G Y, 



6, 7. A Spider Shell, or Aporrhais, in 

 full view, and on the back part, a a. The 

 body. h. A wreath, c. The turban or cla- 

 vicle. ^^f'g» The lip. h. The roftrum, 

 beak, or top. /. /. The finus or fcoop. 

 h The prongs, or claws. 



8, 9. A large Cockle, (hewn infide and 

 outfide, to exhibit Bivalves of equal valves, 

 and that always fhut clofe, 



10. Two opercuhy or lids of Univalves 5 

 the largeft is the Blaita Byzantia, 



11. An Anatifera, or Barnacle, a Quin- 

 quevalve. m. The neck, or griftly appen- 

 dage to which the Shell is affixed. 0, The 

 long, narrow, fpur-like Shell, that is the 

 fifth valve, and lies in a tranfverfe pofition 

 to the other four valves, of which ^. are 

 the two fmaller. 



12. A group of common Balani, or 

 Acorn Shells, which are Multivalves- 



13. Cardo 



