R. Clapp 
Nov. 19 Aranuka Atoll, Gilbert Islands, Pacific 0. ... 
Thalasseus ber£?ii t In two individuals examined, of* 
three^collec ted '"""neither had a brood patch* These 
two birds were males and had testes 5^4 &nd 5^3 mm* 
respectively* The unexamined oird, a female ^ had 
a relatively small ovary (10 mm) with the largest 
ovum 2 mm* (No recent breeding ?) 
Anous stolidus 
Brood j 
Number 
Sex 
Patch? 
Gonads 
Primaries 
Pectirces 
c 
c 
-4- 
C 
K' 
F 
Y e s ■“* 
l4mm3mm 
Not in molt 
R-3 in i sheath 
^>0401 
F 
TVT 
No 
10mm 
1-2-RN 
R? in sheath 
30402 
F 
Yes 
1 * 0 . 4mm 
10 dropped? 
Not in molt 
30404 
F 
Yes 
l.o. 3*™ 
8.P10 in sh. Not in molt 
L all present 
30403 
<7 
* 
Yes 
— 
1&10 in sh. 
10 younger 
(11) R2 Bb. 
r 4 sh. i 
^0406 
M 
Yes 
1 & mm* 
Not in molt 
Not in molt 
30405 
M 
No 
4 mm. 
1„4*5S*6-9N* 
10S 
: R5, L6 1 
R5 older 
Summary i Brood patches were found in both sexes j 
of the Common Noddy and 5 out of 7 birds had 
brood patches* In both males and females , gonads 
were larger in birds possessing brood patches than 
in those'which did not* Of 8 birds 6 were molting 
in the primaries and 5 were molting in the rectrices* 
All those individuals which did not exhibit molt 
were those which p ossessed brood patches* 
Anous minutus 
Brood 
Number Sex Patch Gonads Primaries Rectrices 
3040? F No 12 mm. IS, RN R5,B6 (5,0 id) 
Gygis alba 
Number Sex Gonads 
30408 
30409 
30410 
Brood Patch 
Yes 
No 
Yes 
