OVUM IN OVO. 
FRANCIS H. HERRICK. 
L 
An interesting case of egg within egg recently came to hand, 
which was unique in this respect : that the smaller enclosed egg 
lay in the yolk and not in the albumen of the surrounding 
egg, as in all similar instances hitherto recorded.! This hen’s 
egg had unfortunately been cooked. When it was opened, and 
the white broken into, a suspicious-looking fleck was seen on 
the surface of the hardened yolk, the removal of which dis- 
closed the imbedded egg. The parts of the containing egg 
have not been preserved, so that I can record only the general 
facts here given. 
The included egg measures 17 X21 mm., is of symmetrical 
ovoidal form, possesses a hard shell, shell membrane, and small 
yolk. The shell has a coarse granular texture, and a coffee 
Fic. 1. — Small egg removed from yolk of iarger egg. Natural size. 
color, sprayed with brown pigment. Its form and appearance 
are represented in Fig. 1, its relation to the containing egg in 
FE 2 
Since writing the foregoing and following parts of this paper, 
1 I am indebted for this specimen to Mr. Herbert Tetlow and to Mr. E. B. 
Duffy, by whom it was obtained. 
409 
