organs of generation of the Mexican Proteus. 423 
Fig. 5. The funnel-like opening of the oviduct when pre- 
pared to receive the ova ; magnified four diameters. 
Fig. 6 . The ova inclosed in the ovarium just before they 
are shed, and the mass of fat that lies close to the roots of 
their blood vessels ; magnified four diameters. 
Fig. 7. An ovum with its natural covering, removed from 
the ovarium ; magnified six diameters. 
Fig. 8. An ovum laid bare ; magnified six diameters. 
Fig. 9. An ovum laid open ; magnified six diameters. 
