126 



T^NIA EXPANSA EMBRYOS. 



Plate XV. 



Fig. 1. Embryos uia<fiiilied and tlattened under cover-glass. 



Fig. 2. A single embryo and its envelopes somewhat llattened. 



Fig. 3. The same greatly llattened: a, the thick, oily mass between the inner and 



outer covering, 

 Fig. 4. The same with outer envelope ruptured : a, the outer envelope ; />, the in- 

 ner; <; oil globules; d, the embryo and its pyritorm apparatus. 

 Fig. 5. Embryo, with three envelopes. 

 Fig. 6. Embryo escaped from ruptured inner coat : a, the fringed cap-like covering; 



h, the bladder-like sac protuding from it ; c, the six-hooked embryo. 

 Fig. 7. A younger embryo, inwhich the bladder portion has not burst from the cap. 



a, the cap ; b, the embryo. 

 Fig. 8. Three young tivnia v\'hich show no trace of segmentation. 

 Fig. 9. A young fauiin which is beginning to segment. 

 Fig. 10. A head of young specimen showing a peculiar loop in it. 



