Class Calcarea- calcareous sponges
has asconoid (one-cell thick choanoderm) chamber pattern
spicules made of calcium carbonate
specimens from lab were in tiny tubes
slide is green and looks like a p
LAB: Phylum Arthropoda
Looks like a slug with many pairs of legs
Metamerism not externally obvious; is recognized internally how?
Which arthropod characters do they share with true arthropods?
No whole specimens;