Cohn, Ferdinand, on cultures of Schizomycetes, etc., [44]
Cold-blooded Vertebrates, as hosts of Haemosporidae, [102]
Coleps, [137];
mail-like pellicle of, [141], [152];
C. hirtus, group feeding, [150]
Collar, of Choanoflagellates, [121] f., [122];
of peristome of Vorticella, etc., [156]
Collar-cells, in Choanoflagellates, [121] f., [122], [171], [237];
of Calcarea, [186];