160 
On Homotyposis in. Eggs of the Common Tern 
TABLE N. 
Breadtli of Egg in Pairs of same Clutch. 
I 
00 
OS 
'f 
©i 
T 
'{ 
T 
j 
1 
1 
T 
1 
T 
Totals 
>^ 
00 
00 
c> 
"0 
3-55— 2-59 
1 
1 
2-60— 2-6 J, 
1 
1 
2-65— 2-74 
0 
2-75— 2-79 
1 
1 
2 
2-80— 2-84 
2 
2 
4 
2 
1 
1 
12 
'^■85—2-89 
2 
4 
4 
5 
1 
16 
2-90— 2-94 
1 
4 
4 
10 
14 
8 
5 
1 
47 
2-95~2-99 
1 
2 
5 
14 
16 
12 
5 
55 
3-00— 3-U4 
1 
1 
8 
12 
12 
8 
8 
2 
52 
3-05— 3-09 
5 
5 
8 
4 
3 
25 
3-10—3-14 
1 
1 
8 
3 
4 
17 
3- 15— 3-19 
2 
2 
Totals 
1 
1 
0 
■1 
12 
16 
47 
55 
52 j 25 
17 
2 
230 
TABLE O. 
Length of Egg in Pairs of same Clutch. 
0; 
>^ 
00 
So 
1 
30 
T 
1 
1 
i 
1 
T 
1 
i 
1 
1 
1 
,^ 
1 
1 
Totals 
06 
uo 
LT-, 
c> 
00 
02 
§ 
15 
so 
■4 
■-=?■ 
■<»■ 
■<^ 
•it- 
3-75— 3-79 
3-80— 3-84 
1 
2 
1 
2 
3-85— 3-89 
4 
■2 
2 
1 
1 
1 
1 
12 
3-90-3-94 
2 
2 
3 
1 
1 
9 
3-95—3-99 
1 
2 
3 
6 
6 
2 
2 
2 
24 
4-00—4-04 
6 
8 
3 
2 
3 
1 
4 
1 
28 
4-05—4-09 
1 
2 
3 
4 
4 
4 
1 
1 
1 
3 
24 
4-10-4-14 
2 
1 
2 
2 
4 
8 
6 
2 
3 
4 
1 
1 
36 
4.- 15— 4-19 
1 
3 
4 
6 
2 
5 
1 
2 
24 
4-20—4-24 
1 
1 
2 
1 
1 
2 
5 
2 
2 
2 
1 
3 
23 
4-25—4-29 
4 
1 
3 
1 
2 
1 
12 
4-30-4-34 
1 
1 
1 
4 
2 
2 
4 
5 
20 
4-35—4-39 
3 
1 
1 
5 
4 
14 
4-40-4-ltk 
1 
1 
4-45—4-49 
1 
1 
4-50-4-54 
3 
3 
Totals 
I 
2 
12 
9 
24 
28 
24 
36 
24 
23 
12 
20 
14 
1 
1 
3 
234 
