EAUX EXCELLENTES

ANIMAUX

Poissons

Crevettes

Sangsues.....

Larves do libellules

*Physa fonti-

nalis (L.)...

*Unio pictorum

*Nerites

*Limnêes

**Diatomées

**Infusoires . . . .

**Bolbocace setigera

**Navicelles....

PLANTES

Ranunculus sceleratuB (L.)

Iris fœtida (Link.) Juncus comprps-

sus (Jacq.) Polygonum ara-

ph bium (L.) Zanichellia pa -

lustris (L.) Myriophylumspi

catum (L.) Carex riparia (L Sparganium sim-

plex (Hud.) Potamogeton na-

tans (L.)

Sisymbrium nasturtium (L.)