MYCETOZOA. 



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Order 1. Exosporeae. Spores produced on the sporophores and not enclosed 

 in a cyst. Ceratiomyxa Schroeter, plasmodium in rotten wood fruiting on the 

 outside. 



Order 2. Endosporeae. Spores produced in a sporangium. Badhamia 

 Berkeley, Physarum Persoon, Fuligo Haller, sporangia combined into an 

 rethalium. F. septica Gmelin, flowers of tan. Cienkowskia Rostafinski, 

 Physarella Peck, Craterium Trentepohl, Leocarpus Link, Chondrioderma Rost., 

 Trichamphora Junghuhn, Diachaxt Fries, Didymium Schrader, Lepidoderma 

 de Bary, Stemonitis Gleditsch, Comatricha Preuss, Enerthcnema Bowman, 

 Lnmprodcrma Rost., Clastoderma Blytt, Amaurochcete Rost., Brefeldia Rost., 

 Lindbladia Fries, Cribraria Pers., Dictydium Schrad., Licea Schrad., Orcadclla 

 Wingate, Tubulina Pers., Siphoptycliium Rost., Alwisia Berkeley and Broom e, 

 DictydioBthalium Rost., Enteridium Ehrenb. , Rcticularia Bull, Trichia Haller, 

 Oligoncma Rost., Cornuvia Rost., Arcyria. Hill, Lachnobolus Fries, Perichccna 

 Fries. Margarita Lister, Dianema Rex, Prototrickia Rost., Lycocjnla Michel i. 



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7 iG. 13. Didymium di/orme (after Lister), 

 a, spore ; b, swarm-cell escaping from the 

 spore-case ; e, newly hatched swarm-cell 

 with nucleus anil three vacuoles ; d, flagel- 

 lated swarm-cell ; t-, swarm-cell with two 

 vacuoles containing bacteria, and produced 

 at the posterior end into pseudopodia ; /, 

 amoeboid swarm-cell, x 720. 



FIG. 14. Didymium di/orme (after Lister), 

 young plasmodiuni with attendant amoe- 

 boid swarm-cells, some of which have 

 turned into microcysts (m) ; one micro- 

 cyst being digested in a vacuole (v). An 

 empty spore-shell at s. x 470. 



In the neighbourhood of Mycetozoa may be placed provisionally the peculiar 

 marine form Labyrintliula, described by Cienkowsky (Arch. f. M. Anat., III.), 

 from the harbour of Odessa. This animal consists of aggregations of roundish 

 to spindle-shaped cells placed in a finely granular substance. From this mass, 

 hyaline or finely fibrous processes are given off. These processes branch and 

 anastomose so as to form a labyrinthic network along which the cells glide. 

 Clilamydomyxa Archer (Q.J.M.S., XIX.), seems to be a fresh-water organism of 

 the same nature. 



The Sorophora which are classed by some authors with the Mycetozoa, appear 

 to be more nearly allied to Labyrinthula. In the vegetative phase they live on 

 the dung of various animals, and are formed by the coming together of numbers 

 of amcebulfe produced from spores. The amcebulse, however, retain their 

 distinctness, and do not fuse to form a homogeneous plasmodium as in the 

 Mycetozoa, nor are there streaming movements throughout the mass. The mode 



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