These twins had a broad bony union in the lower part of the lumbar region, the pelvis being obviously completely fused.

They had a common urethral and anal aperture, but a double vaginal orifice, with a very apparent septum.
The sensation was distinct in each, except where the pelves joined.
They were exhibited in Paris in 1891, being then on an exhibition tour around the world.

Rosa was the stronger, and when she walked or ran forward she drew her sister with her, who must naturally have reversed her steps.

They had independent thoughts and separate minds; one could sleep while the other was awake.

Many of their appetites were different, one preferring beer, the other wine; one relished salad, the other detested it, etc.