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AMERICAN NATURALIST 


Vor. XXXVI. August, 1902. . No. 428. 




THE ANATOMY OF A DOUBLE CALF. 
HENRY LESLIE OSBORN. 
THE subject of this article is a Durham calf born near Minne- 
apolis, Minn., in March, 1901. It lived only ten minutes; but 
excepting that there was a fracture in the hip bone no indica- 
tion of injury was seen, and the different organs presented such 
a healthy appearance as to justify the belief that the calf could 
have been reared by taking special pains to that end. I owe 
the opportunity to examine the case to Mr. H. W. Howling, a 
taxidermist of Minneapolis, who sent me the carcass after the 
removal of the skin. I am indebted to Dr. C. Hart Merriam, 
Washington, D.C., for an introduction to the literature of 
teratology. 
The appearance of the stuffed skin is shown in the two photo- 
graphs, Figs. 1 and 2, views from behind and from the dorsal 
surface. There are two perfect anterior bodies, each with its 
head and thorax and the anterior part of the abdomen, and there 
are four perfect anterior limbs. The left body appears in the 
mounted condition (see Fig. 2) to be a complete body, into the 
side of which the anterior right half has been grafted at an 
angle of about ninety ione d 25 hind legs stand nearly at 
