APPENDIX. 
22 
SAXIUAVA. Bellevue. 
S protexta. pl.4, fig. 6. Shell elongatod, very inequilateral, contracted 
from beak to base; posterior hinge margin parallel with the ventral; 
beak prominent, and margins rounded. 
Locality. 
ZIZYPIIIXUS. Gray. CALLIOSTOMA. Swains. 
Z: Virginicus, pi. 4, fig. 4. Trochiform ; spire and last volution equal 
in height ; 2 prominent revolving lines on last volution immediately above 
the aperture, the upper one having a slight channel where it joins the 
volution, another line near the suture and only two lines on each of the 
other volutions at top and base ; suture carinatcd ; base with four large 
revolving lines or ribs and other unequal finer lines subumbilicated. 
Locality: Suffolk, Virginia. 
I found the specimen, from which the description was made, in a marl 
bank in the yard of a dwelling amf the main street of the village, uear the 
Yansemond river, where many fine specimens of Mulinea congesta and 
other fossils may be collected. 
TURRITELLA. Lam. 
T. jperexilis, pi. 4, fig. 9. Shell slender, volutions convex, 3 acute 
prominent revolving ribs on each, a prominent line below the suture, and 
fine revolving lines between the ribs; obscure, oblique longitudinal plica- 
tions which snbintercalate the ribs; sutural area deeply impressed. 
Locality. Wilmington, Y. C. 
T. Carolinensis , pi. 4, fig. 8. Shell elongated, broad and angular at 
base; volutions with their sides' very slightly convex and obsoletely con- 
tracted below the suture which is deeply impressed : revolving lines fine, 
slightly prominent, alternated, 11 on the penultimate volution ; aperture 
large, subquadrangular. 
Locality. 
FISSURELLA. Lam. 
F. Carolinensis , pi. 4, fig. 1. Shell suboval, sides compressed, 39 
very prominent flat sided ribs, rugoso — crenulated. Fissure oblong, 
narrow. 
