What six kinds of clouds are described in the passage about the weather?

The article Seeing the Weather from Clouds mentions eight kinds of clouds, such as cirrus, cirrocumulus, cumulonimbus, altocumulus, cumulus, stratus, cirrostratus and nimbostratus.

(1) sunny day:

Species: Cirrus, cirrocumulus, Cumulus, Altocumulus;

Features: light, high and thin.

2 rainy and snowy days:

Species: cirrostratus, Stratosphere, nimbostratus, Cumulonimbus Cloud;

Features: dense, low and thick.