No. 428.] THE ANATOMY OF A DOUBLE CALF. 613 
fused centrally ; there were two gall bladders beside each other 
in the middle line; the uterus was double; the vertebral 
columns were entire and separated by a mass of bone con- 
sisting of fused rudimentary ossa innominata ; the sterna were 
united at their manubria. Reference has been made in an 
earlier part of this 
paper to the case 
of a human fetus 
dissected by Dr. 
Jeffries Wyman 
(66). It was less 
double than the 
calf. There were 
only three arms, 
the median one 
made up of two 
halves fused; a 
single pericardium 
enclosing two 
hearts; a single 
lower vena cava 
branching ante- 
riorly to enter each 
heart ; the umbili- 
cal cord had one 
vein and two arte- 
ries. Theright and 
left duodenums 
came together 
a short distance [SEE 
from the two stom- Fic. 9. — The Tocci — ann — in possession 
i 
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achs, whose pyloric 
ends were turned toward each other (“symmetrical counter- 
parts," Bateson, p. 559), but afterward separated and, though 
Side by side, continued distinct nearly to the caecum, which, 
as well as the large intestine, was single. There was a single 
urinary bladder with a double cavity. There were only two 
kidneys, but they were compound, and each — mo TTT 
