These species occur inside the corpuscles grouped in large numbers in pairs of piriform parasites connected at their pointed extremities.
Two free parasites which would presumably have entered a fresh corpuscle either singly or together.
It was noted several times in observing the microscopic field that the first corpuscles whose contained parasites escaped were those that harboured four young parasites.
Some of this alteration of form is attributable to the rotation of the parasites within the corpuscle.
In addition, calcareous corpuscles were abundant in the neck region and few small granules aggregated in the rostellum of the cysticerci from the gerbils.
The parasites multiplied rapidly only during the last 36 hours, but they never infected more than 0-5 °/0 of the corpuscles.
On one occasion we saw a medium-sized parasite escape and degenerate outside the corpuscle which it left uninjured.
The number of infected corpuscles as compared to uninfected ones was small.
