No. 5.] THE CESTODE MOXIEZIA EXPANSA. 



223 



--C 



FIG. 6. 



the remainder of the proglottid. At d a triangular depression 

 appears in consequence of the fact that the contours of the 

 portions a, b, and c are somewhat rounded at this point where 

 all three meet. The same con- 

 ditions are present in some 

 degree on the lower surface 

 also, so that the thickness of 

 the body at d is very slight. 

 Inter-proglottidal glands appear 

 just anterior to the extra trans- 

 verse furrow, thus showing the same relation to it as to the 

 normal complete furrow. This is usually the case, provided 

 the abnormal furrow attains a certain degree of depth. 



Figure J. 



This is a case of partial division seen from the ventral side. 

 The segment is undivided at the left, and one genital mass 

 appears. To the right of the middle, however, a short partial 

 furrow appears on each surface, the two corresponding closely 

 in position. The right edge shows clearly a division into two 

 segments, and a very short furrow extends from it on to the 

 ventral surface. In accordance with these indications of division 

 in the right half two genital masses appear. 



The fact that the two partial furrows correspond so closely on 

 the two surfaces indicates that they are distinctly the result of 

 internal conditions. Judging from the existence of the two geni- 

 tal masses and the short furrow at the 

 right edge, it appears probable that 

 division or separation exists in a cer- 

 tain degree between the two regions, 

 even where the actual furrows do not 

 appear. Many other cases support this view. It would appear 

 that the individuality of the segment must attain a certain degree 

 of development in order to cause the formation of furrows, and 

 that, where only partial furrows exist, the division may be in 

 many cases more complete than the furrows indicate. 



The short furrows on the two surfaces bear inter-proglottidal 

 glands like the complete furrows. 



FIG. 7. 



