MYCETOZOA. 



17 



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 m#b an 

 jethalium. F. septica Gmelin, flowers of tan. Cienkowslcia Rostafinski, 

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

 Trichamphora Junghuhn, Diachcea, Fries, Didymium Schrader, Lepidoderma 

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

 Lamproderma, Rost., Clastoderma Blytt, Amaurochcete Rost., Brefeldia Rost., 

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

 Wingate, Tubulina Pers., Siphoptychium Rost., Alwisia Berkeley and Broome, 

 Didydicethalium Rost., Enteridium Ehrenb., Reticularia Bull, Tricliia Haller, 

 Oligonema Rost., Cornuvia Rost., Arcyria Hill, Lachnobolus Fries, Perichcena 

 Fries, Margarita Lister, Dianema Rex, Prototrichia Rost., Lycogala Michel i. 



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

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

 spore-case ; c, newly hatched swarrn-cell 

 with nucleus and three vacuoles ; d, flagel- 

 lated swarm-cell ; e, 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 plasmodium 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 Labyrinthula, 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 labyrinth ic network along which the cells glide. 

 Chlamydomyxa 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 amoebulse, 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 



C 



