IN DESCRIBING SHELLS. 41 



Sqiiamulis is with little scales, as Tellina Lingua felis and 



Buccinum decussatum. 

 Thiherculata is when covered with little raised knobs or 



tubercles, as Buccinum papillosum, Cy^prcea Nucleus, and 



Trochus maculatus. 

 Nodosa is knotty, as in Ostrea nodosa, Cardium tuberculatum, 



Murex Trunculus and Jjignarius. 

 Spinis is when it is armed with long prickles or spines, as in 



Murex Brandaris and Trunculus, and Turbo Delphinus. 

 Mu7-icata is covered with many sharp points, as Chama Giy- 



phoides and Buccinum patulum. 

 Scabra is rough, as Tellina Ungua felis and Buccinum Per- 



sicum. 



