APPARENTLY CORRELATED TO THE CONDITIONS OP LIFE. 
;I25 
Shells of the Inner Deposit. 
(a.) Shells Varying in Length between 25’5 mm. and 19 mm. 
Measuroments of shells in millimetres. 
Average breadth of shells having the same lengdi. 
1 
Ratio of length 
to breadth. 
Length. 
Breadth. 
Length. 
Average 
breadth. 
Number of 
sheds. 
25-5 
17-5, 17 
25-5 
17-2 
2 
1 : 0-73 
25 
17-5, 17, 16-5 
25 
17 
3 
-68 
24-5 
16(3) 
24-5 
16 
2 
-65 
24 
17, 16(2) 
24 
16-3 
3 
-67 
23-5 
16(2) 
23-5 
16 
2 
-68 
23 
15-5(2), 14.5 
23 
15-1 
3 
-65 
22-5 
16, 15-5, 15 
22-5 
15-5 
3 
-68 
22 
16(2), 15 ( 4 ) 
22 
15-3 
6 
-69 
21-5 
15-5, 15(2) 
21-5 
15-1 
3 
-70 
21 
14-5 
21 
14-5 
1 
-69 1 
20 
13 
20 
13 
1 
-65 
19 
14 
19 
14 
1 
-73 
Average ratio of length to breadth in 30 shells varying in length between 25‘5 mm. and 19 mm. 
is 1 : 0'682. 
(6.) Shells Varying in Length between 30 mm. and 25'5 mm. 
Measurements of shells in millimetres. 
Average breadth of shells having 
the same length. 
Ratio of length 
to breadth. 
Length. 
Breadth. 
Length. 
Average 
breadth. 
Number of 
shels. 
30 
20 
30 
20 
1 
1 : 0-66 
29 
20 
29 
20 
1 
-69 
28 
19, 17-5 
28 
18-2 
2 
-65 
27-5 
19-5, 19, 18 
27-5 
17-5 
3 
-63 
27 
19(3), 18 ( 2 ), 17..5 
27 
18-4 
6 
-68 
26-5 
18(3), 17 . 5 , 17 
26-5 
17-6 
4 
*67 
26 
18(3), 17 5, 17(3) 
26 
17-5 
11 
/ 
-67 
25-5 
18, 17-5(3), 17(3) 
25-5 
17-3 
6 
-67 
Average ratio of length to breadth in 30 shells varying in length between 30 mm. and 25'5 mm. 
is 1 : 0-660. 
