50 
FOSSIL POLYTHALAMIA FROM NORTH AMERICA 
s 
c 
1103 
A 
Monterey, California; fossil Polythalamia; extracted 
"by means of KO, from a greenish stone 
s 
c 
1104 
B 
Monterey, California; fossil Polythalamia; by K0 
s 
c 
1105 
C 
Monterey, California; fossil Polythalamia; by KO 
s 
c 
1106 
D 
Monterey, California; fossil 
s 
c 
1107 
E 
Leon Springs, West Texas; U.S. Mexican Boundary 
Survey, no. 18 ; Cretaceous 
s 
c 
1108 
F 
Upper Missouri; yellow calcareous marl 
s 
c 
1109 
G 
Upper Missouri; yellow calcareous marl; Dr. Nicollet 
s 
c 
1110 
H 
Upper Missouri; yellow calcareous marl 
s 
p 
c 
1111 
I 
Upper Missouri; yellow calcareous marl; Cretaceous 
s 
c 
1112 
J 
Columbus, Mississippi; coarsest part; 260 feet 
s 
c 
1113 
K 
Columbus, Mississippi; coarsest part; 260 feet 
s 
p 
c 
1114 
L 
Columbus, Mississippi; l40 feet 
s 
p 
c 
1115 
M 
Columbus, Mississippi; l40 feet 
s 
p 
c 
1116 
N 
Columbus, Mississippi; l40 feet; heavy part 
s 
c 
1117 
0 
Columbus, Mississippi; 260 feet; heaviest part 
s 
p 
c 
1118 
P 
Jackson, Mississippi 
s 
p 
c 
1119 
Q 
Jackson, Mississippi 
s 
c 
1120 
R 
Mississippi Station, Mississippi 
s 
c 
1121 
S 
Mississippi Station, Mississippi 
s 
p 
c 
1122 
T 
Alabama; matrix of Zygodon 
s 
c 
1123 
U 
Centreport, Alabama 
s 
c 
1124 
V 
Centreport, Alabama 
s 
p 
c 
1125 
W 
Centreport, Alabama 
s 
c 
1126 
X 
South Carolina; Eocene; Polythalamia vith Ostrea 
sellaeformis 
s 
c 
1127 
Y 
[No locality]; chalk; cleaned with CO^ 
