Part 3 (1/2)

2. Flagellum never thrown off 3

3. a. Pseudopodia lobose Genus _Mastigamoeba_

b. Pseudopodia ray-like Genus _Mastigophrys_

Family _Codonoecidae_:

1. Goblet-shaped cups adherent Genus *_Codonoeca_ by stalk

Family _Heteromonadidae_:

1. The long flagellum vibratory Genus *_Monas_

2. The long flagellum rigid; Genus _Sterromonas_ shorter one vibrates

* Presence at Woods Hole indicated by asterisk.

KEY TO MARINE QENERA OF CHOANOFLAGELLIDA.

1. Without gelatinous 3 or membranous test

2. With gelatinous 4 or membranous test

3. a. Attached forms:

1. Without a stalk, or with Genus *_Monosiga_ a very short one

2. With a long, simple, stalk Genus *_Codonosiga_

3. With a long, branched, stalk Genus _Codonocladium_

b. Free-swimming Genus _Desmarella_

4. Colonial, and with a gelatinous Genus _Proterospongia_ covering

* Presence at Woods Hole indicated by asterisk.

KEY TO FAMILIES AND MARINE GENERA OF HETEROMASTIGIDA.

1. Two flagella nearly equal in size Family _Bodonidae_

One main and 2 accessory flagella Family _Trimastigidae_

Family _Bodonidae_:

1. Body very plastic, Genus *_Bodo_ almost amoeboid