SYSTEMATIC INDEX. 
The species not printed in italics, are those whose dis- 
tiuctness is doubtful, or which having only been found 
after death, have probably heen cast ashore from wrecks. 
The numerals refer to the page at which each species is 
described. 
sb Ro if 
ANNELIDES. eS Ly and Se 
mistriatum, 3. 
DENTALIUM. VU om 
Entalis, \ (a). Octangulatum, 2. 
Tarentinum,2, f.6. Young Lahiatum, 3. 
te cas 
PRA 
(a) According to M. Deshayes, this and the succeed- 
ing shell form but one species. We shall not be sur- 
prised if this opinion prove correct with regard to the com- 
mon Keutish specimens, (in abundance at Pegwell Bay) 
which we consider to be the Entalis of the majority, of 
British cabinets. 
