1. cell fusions (cf - found in some species due to transparency of the thallus);
2. trichocytes (t) more or less frequently present.

tab. 32

1. secondary pit-connections (p2 -in transverse section);
2. trichocytes rarely present.

tab. 29

1. cell fusions (cf - better detachable in transverse section);
2. trichocytes absent.

Spongites fruticulosa

1. secondary pit-connections (p2 -in transverse section);
2. trichocytes not recorded or absent.

tab. 35