126 
TURRITELLA Terebra. 
TAB. DLXV.—/ig. 3. 
Spec. Cuar. Turreted, elongated, transversely 
sulcated ; whorls convex, sulci many, nearly 
equal; spire pointed. 
Syn. Turritella Terebra. Lamarck Hist. Nat. 7. 
p. 56. Turbo Terebra Auct. 
Ir this differ at all from the recent species, it is in the 
thickness of the shell and greater distinctness of the 
whorls; but these differences are very slight. 
Found with Rostellaria Pes Pellicani (t. 558.) by 
Mr. Rose of Swaffham. I suspect both to be shells of a 
more modern growth than any genuine Crag shells. 
ee EP ee 
TURRITELLA costata. 
TAB. DLXV.—fig. 4. 
Spec. Cuar. Subulate, striated, rough, costated ; the 
costz terminate above the lower carinated edge 
of each whorl ; base flat, its edge carinated. 
he 
Tue carinated edge of this elegant shell forms a thread 
that winds round the spire separating the coste of one 
whorl from those of the next ; the whorls are very nu- 
merous. 
An individual of this species is now and then met with 
along with T. granulata. 
Ee 
TURRITELLA concava. 
TAB. DLXV.—/fig. 5. 
Spec. Cuar. Short subulate, smooth ; whorls many, 
concave ; base convex. 
From eight to twelve whorls with elevated edges and 
concave surfaces form this shell: when full grown the 
last whorls have a ridge in the middle, as shown in the 
lower figure. 
Occurs not rarely in the Limestone at Chilmark near 
Tisbury, Wiltshire. Presented by Miss Benett. 
