118 CONCHOLOGIST’S COMPANION. 
— lh 
Anil i 
Nerita. Trochus. Turbo. Serpula. 
Haliotis. Dentalium. Voluta. 
Trochus signifies a top, of which the TJ’. conchylio- 
phorus, or Carrier, is invariably covered with extra- 
neous substances closely adhering to the whirls of 
the shell. This singular species admits of two dis- 
tinct varieties, one of which is familiarly called the 
Conchologist, from its, being loaded with perfect 
shells or fragments; or the Coral-Carrier, when 
merely the bearer of polypiferous insects; the 
second, the Mineralogist, as its adhesions consist of 
stones and ores. The beautiful 7. vernalis, or Green 
Trochus, belongs to this division of Testacez: it 
