SECTION X. 225 



Genus i. Murex, Rocks, or tbofe Shells 

 that have a long and equally.n arrow mouth, 

 (apertura fubhnearis) and are externally 

 very rugged. PI. V. fig. 5, a Devil. 



Genus 2. Rhombi, whofe I'liborduiate 

 charafter is, that their iliape or contouc 

 is rhon^bic. PI". V* fig. 2* 



Genus 3. Alatse, or winged Shells, whofe 

 lips extend ;nto a large flap or wing, Pl.V, 

 fig. I. 



Genus 4. Aporrhaida?, or winged Shells, 

 whofe flaps or wings are bordered with 

 large fpikcs or procefl'es, hke fingers, as 

 the fpiders, &c. PI. I. fig. 6, 7. ' 



It is needlefs to mention here the rank 

 my feveral genera of Murices bear to other 

 fyftems, for they are placed by moft au- 

 thors in a family called Murex, or among 



Q Buccina 



