AD END & 
AND 
EMENDATIONS. 
The British Dentalium Dentalis is not that described 
by Linneus but is the Tarentinum of Lamarck. This 
conclusion is made from a comparison of Turton’s speci- 
men with the Mediterranean species. 
SprrorBis. ConicA.—HerToropisca. C. Flem. 
Edin. Enc. t. 205. f. 3.—Fl. Ed. Phil. 7. vol. 12. 
p. 247.—Sinistral, strong, hyaline, triangular. 
When young the upper part of the whorl has a dis- 
tinct groove with a low acute ridge on each side and a 
very small central cavity. In this state the whorls are 
two in number, the outer one lateral with a spreading 
base. The third whorl in its growth not only embraces 
