168 
ORTHOCERA cincta. 
TAB. DLXXXVIII.—fg. 3. - 
Spec. Cuar. Nearly cylindrical, surface ornament- 
ed with numerous sharp annular strie ; siphon 
central. 
Iw this species the septa are rather more concave than 
is usual, and also distant. The transversely striated 
surface is what it is best distinguished by, and seems to 
indicate a shell formed outside the animal. 
I have seen but one specimen; it was lent me by Dr. 
A. Moore, who obtained it near Preston. 
