246 



CHILD. 



[VOL. I. 



that the notch in the right edge which appears to separate a from 

 b is really in a, for the dorsal furrow reaches the edge anterior to 

 it, and the two pores are equidistant from this furrow. At the 

 left side of a b there are two complete sets of organs opening to 

 the exterior through a common pore which lies in the middle of 

 the undivided edge of a b. In the region of the ovaries the 

 furrows are normal, and accordingly the ovaries are nearly the 

 normal distance apart. The left end of a is short, so that the full 

 normal distance between the ovaries is not attained. Since the 



FIG. 22. 



furrows do not quite reach the edge, it is undivided, and presents 

 the relations of a single rather long proglottid. As might be 

 expected, only one pore is present, though rather larger than 

 normal, and into this the two oviducts and two vasa deferentia 

 open, for the two sets of ducts approach each other as they reach 

 the undivided region. 



The segment c, of about normal length, and the segment d, 

 which is of less than the normal length, except at the edge, are 

 partially separated by two partial furrows which correspond very 

 closely in position and extent on the two surfaces. The segment 

 c is nearly the same length throughout, but d is longer at the 



