GASTELROPODA OF THE LOWER GREEN MARLS. 97 
Genus MOREA Conrad. 
MoREA NATICELLA. 
Plate x11, Figs. 19, 20. 
Purpurea (Morea) naticella Gabb: Jour. Acad. Nat. Sci., Phila., 2d ser., vol. 4, 
p. 301, Pl. xvi, Fig. 15 (14 on plate). 
Morea naticella Gabb: Synopsis, p. 59; Meek, Check List Cret. and Jur. Foss., p, 
19; Geol. N J., Newark, 1868, p. 729. 
?Morea naticella Gabb: Stoliczka, Ind. Geol. Sury., Pal. Indica, Cret. Fauna 
South. Ind., vol. 2. 
Morea cancellaria Conrad: Jour. Acad, Nat. Sci., Phila., 2d ser., vol. 4, p. 290, 
Pl. xuvi, Fig. 30. 
Shell of about a medium size, subglobular, or broadly oblate in out- 
line, with ventricose volutions which are most inflated on the upper third, 
and number about three and a half; spire moderately high for the genus; 
aperture broadly elliptical, pointed above and obtusely so at the base; col- 
umella with a single spiral ridge near the lower part, as seen on the inter- 
nal cast; surface marked, even on the cast, by strong spiral ridges and fur- 
rows, of which ten or eleven of the former may be counted, leaving a plain 
space at the base of the shell equal to that of two of the ridges; -also by 
somewhat more distant, transverse, broadly rounded ridges which divide 
the surface into a series of regular low tubercles. 
I do not know of any Cretaceous sheil at all resembling this one in 
this country except Morea cancellata Conrad, from the Cretaceous deposits 
at Eufaula, Alabama, which I strongly suspect to be the same species, but 
the specimen figured is much smaller, and this one does not appear to have 
been so much produced in front as is that one. This may be due, how- 
ever, to the difference between the actual shell and the cast of the interior 
only. 
Mr. Conrad considered this genus to belong to the Purpurida,'! and I 
think very properly so, judging from his figure. It seems to differ very 
little from the recent group Cisfruwm Mont, except in the presence of the 
ridge or plication on the lower part of the columella, being somewhat more 
distinct than in that genus. Stoliezka places it, with doubt, with the Ra- 
'Am, Jour. Conch., vol, 4, p. 249, 
MON, XVIII——7 
