14 BRITISH MYCETOZOA. 



will be discovered as fresh workers in different parts of the country 

 take up the study. 



The sporangia are found at all seasons of the year except in 

 frosty and very dry weather, and every new locality that is searched 

 affords abundant material, frequently including species of special 

 interest which are rare elsewhere. 



There is perhaps no group of organisms so easily within reach 

 which offers at the present time so rich a reward to microscopic 

 research. 



SYNOPSIS OF THE ORDERS AND GENERA OF THE 

 BRITISH MYCETOZOA. 



Sub-class I. — EXOSPOREiE. Spores developed outside the 

 sporophores. 



Order I. — Ceratiomyxace^. Sporophores membranous, 



branched ; spores white, borne singly on filiform stalks arising 

 from the areolated sporophore. 



Genus i. Ceratiomyxa (p. 17). 



Sub-class II.— ENDOSPORE^E. Spores developed inside the 

 sporangium. 



Cohort l.—AMAUROSPORALES. Spores violet or violet- 

 brown (ferruginous in Stemonitis ferruginea and S. Smitliii). 



Sub-cohort I. — CALCARINEAZ. Sporangia provided with 

 lime (= calcium carbonate). 



Order I.- — Physarace^. Lime in the form ot minute innate 

 granules. 



A. Capillitium charged with lime throughout. 



Genus 2. Badhamia (p. 17). 



B. Capillitium of hyaline threads with lime-knots (see Introduc- 

 tion, p. 12). 



Genus 3. Sporangia single, sub-globose or plasmodiocarps ; 



capillitium without free, hooked branches. Physarum (p. 18). 



Genus 4. Sporangia forming an aethalium. Fuligo (p. 21). 



Genus 5. Plasmodiocarps ; capillitium with free, hooked 



branches. Cienkowskia (p. 21). 



Genus 6. Sporangia goblet-shaped or ovoid ; stalks cartilagi- 

 nous. Crateriion (p. 21). 



Genus 7. Sporangia ovoid, shining, clustered ; stalks mem- 

 branous. Leocarpus (p. 22). 



C. Capillitium without lime. 



Genus 8. Sporangium-wall opaque. Chondrioderma (p. 22). 

 Genus 9. Sporangium-wall hyaline. Diacliaa (p. 24). 



