167 * 
The var. y , is the only one I have seen British : 
var. /3, is not I think described by any Author ; I have 
one specimen only of it, and am ignorant of its exact 
Ideality : var. a, and specimens approaching the others, 
are not rare at Grignon. Some of the English speci- 
mens are very like var. /3, while others have hardly any 
appearance of costae, except upon the spire ; these latter 
are most properly what Brander has called Murex tur- 
gidus. I am indebted to Miss Teed and another Friend 
for the series by which I have been enabled to trace the 
connection with the French varieties ; they are from 
Hordwell Cliff, 
