From the little bag (f) at the bottom of the cavity (g) the receiver produces a chaplet, which traverses the canal in the received marked (2) in Figure 6, and which is here drawn the size of life, was sometimes expanded to the length of one foot eight inches.

This organ, according to M.Cuvier, is composed of ovaries, tentacula, and suckers.
The swimming apparatus, marked (1) and (4) in Figure 6, act simultaneously; they are of a bright amber colour, and their mouth (a) and (h) are closed with little valves, nearly invisible even when in motion; the points round their upper aperture seem to form the hinges for these.

In twenty seconds I counted seventy expansions and dilatations of this apparatus.

The chaplet and the bag that holds it are flesh-coloured; the rest of the body is gelatinous and diaphanous.

They live in families, and swim with great rapidity in the same manner as the other Acalepha.
Caught also shells and crabs of the same kind as yesterday.
November 14.