350 BIOLOGY OF THE PROTOZOA 



Sub-class 1. PROTEOMYXA. 



1. Individuals Heliozoa-like ; usually solitary . 2 

 Individuals fuse into thread-like plasmodia 



Family 1, LABYEINTHULIDiE 



2. With flagellated swarmers Family 2. Zoosporid^ 



Without flagellated swarmers . . . Family 3. Vampyrellid^ 



Family 1. Labyrinthulidae, Hseck. 



One genus oiAy; little known Genus Labyrinthula 



Family 2. Zobsporidse, Zopf-Delage. 



Intracellular parasites of Algae, Volvolx, etc. 



Genus Pseudos'pora 



Starch-eating amoel:)oid forms Genus Protovionas 



Free-living, body red; marine Genus Protomyxa 



Family 3. Vampyrellidae, Doflein. 



Form changeable; colorless; ray-like pseudo- 

 podia Genus Nuclearia 



Body branched ; naked; pseudopodia delicate 



Genus Arachnula 

 Color reddish; ectoparasitic on Algae. .Genus Vampyrella 



Color greenish ; cysts of cellulose Genus Chlamydomyxa 



Colonial forms Genus Myxodictium 



Body sharply pointed at base of pseudopodia 



Genus Biomyxa 

 Protoplasm of body and pseudopodia yellow 



Genus Rhizoplasma 

 Body yellow; pseudopodia colorless. . .Genus Dictomyxa 



Sub-class II. MYCETOZOA, de Bary. 



Pseudoplasmodium in some; no peridia nor 

 capillitia; sporangium a mere mass of 



spores Order 1. Acrasida 



Parasitic; no peridia nor capiUitia. . .Order 2. Phytomyxida 

 Plasmodia; peridia and capillitia. . . .Order 3. Euplasmodida 



Order 1. Acrasida, van Tieghem. 



Ama?bse solitary; stalked spore-case Family 1. Sappiniid.e 

 Amoebse grouped; sori from group. .Familj^ 2. Guttulinid^ 

 Amcebse grouped; stalks of sori hardened 



amcebse Family 3. DicTYOSTELiDiB 



Family 1. Sappiniidae, Dangeard. 



One genus and species; dung of horse, cow, 

 dog, etc Genus Sappinia 



Family 2. Guttulinidse, Cienk. 



Cells do not form stalks of sori Genus Copromyxa 



Short stalks bearing sori Genus Guttulina 



Family 3. Dictyostelidae, Rostafinsky. 



1. Stalks unbranched 2 



Stalks branched Genus Polyspondylium 



2. Spores without definite arrangement Genus Dictyostelium 

 Spores in row like string of beads. . . Genus Acrasis 



Order III. Euplasmodida, Lister. 



Spores exposed on surface of sporophores 



Sub-order 1. Exosporea 

 Spores in sporangia Sub-order 2. Mvxogastres 



