MICHIGAN ACADEMY OF SCIENCE. 17 



EXPLANATION OF PLATE 



All drawings were made from 'in toto' preparations with the aid of the 

 camera lucida. The abbreviations used are: ci, Cirrus; de, Ductus ejacula- 

 torius; ov, Ovary; t, Testes; ua, Anlage of uterine pouches; up, tJterine 

 pouches; va. Vagina; vd, Vas deferens; vi, Vitellaria. 



Fig. 1 . — Ripe proglottid in outline. 

 Fig. 2. — Head and neck. 



Fig. 3. — Protruded cirrus, detailed drawing of cirrus shown in figure 1. 

 Fig*. 4. — Main excretory vessels in nearly mature proglottid. 

 Fig. 5. — Nearly mature proglottid. 29 mm. posterior to head. Figures 

 4 and 5 represent the same proglottid. 



