148 



CHILD. 



in time of development, a series of spirals may be formed such as 

 appears in Fig. 35 (Pt. II.). If the development of the dorsal 

 and ventral portions of both right and left anlagen is accelerated or 

 retarded the parts show normal relations to adjacent proglottids. 

 In some cases a form of spiral somewhat different from that 

 just described is produced; in this the furrows on one surface of 

 the body bend either anteriorly or posteriorly near the right or 

 left margin and so unite with other than the furrows correspond- 

 ing in position on the opposite surface. 



FIG. 73. 



The only well-developed case of this kind was shown in Fig. 

 36 (Part II.). Another case approaching this condition was shown 

 in Fig. 37. These two figures are reproduced here as Figs. 73 

 and 74. Both are viewed from the dorsal surface. It is evident 

 from the figures that the growth is incomplete in the region 



