489 
DARESTE believed that the heart grew very rapidly and growing quite large dis- 
placed the head, but KAESTNER does not conceive this in view of the above. 
DarestE described omphalocephalic in a double monster with separate 
necks, but a common head. GruNDMANN®! and WuckeEr®? describe double 
omphalocephalia in chicks of five days incubation. Quite recently Manı- 
KowskY®® describes a monster that closely resembles omphalocephalia, this 
representing the second that had come under his notice. 

Fig. 1. Double Chick with apparent fusion in the cephalic region. 
The writer desires to present a number of monstrosities that have 
come under his observation during the course in embryology. Of 
these eight are chicks, one duck, one cat and a calf. Of the chicks, 
three represent the first 72 hours of incubation, two full incubation 
periods and one adult; the cat and calf are at term. 
1. This monster (Fig. 1) shows two bodies with apparently a 
fused head. One body exhibits 19 somites and the other 17. There 
is but a single heart, apparently, and the head, although seemingly 
