F. J. Meggitt 
409 
these two posterior wings persist in mature segments, but my own 
observations do not agree with this. In the more mature proglottides 
the two wings approach and coalesce, the uterus becomes sac-like and 
fills the whole proglottis, extending beyond the excretory canals. The 
cavity continues to be incompletely subdivided by numerous septa. 
The onchospheres (Clerc, 0-034 mm.) are 0-038 mm. by 0-029 mm., 
their hooks 0-019 mm. long (Clerc, 0-014 mm.). 
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