SECTION Vir. 149 



1. Vermiculi, or tubular Worm Shells, 

 which have no fixed or regular form, as 

 the common Vermicuh. 



2. Penecilli, or thofe other Worm Shells 

 which in the whole or any efpecial or par- 

 ticular part, have a determinate regular 

 ihape or ftrudlure, 



I have already hinted the near approach 

 of thefe Shells and their animals to corals ; 

 but that I Ihould keep them feparate, and 

 as teftacea. However, I (hall reject all 

 the Sea Worms which inhabit tubes made 

 up of grains of fand and other fubftances, 

 connefted or joined together by a gluti- 

 nous matter ; for they are not a ftrufture 

 of a folid teflaceous fubftance, and there- 

 fore cannot be reckoned as Teflacea : fuch 

 as the SabelbcE Linnasi *. 



^ Syfl. Nat. 1263. ^ss- 



L 3 The 



