Cochleare, [225]

Cocoons, of Triclads, [40];

of Oligochaeta, [364], [365];

of Leeches, [404]

Coelom—see Body-cavity

Coelomic fluid, of Polychaeta, [252];

as cause of colour, [291]

Coelopus, [225]

Cohn, on Rotifers, [198]

Collar, peristomial, of Sabellidae, [336];