.1 Monograph of the Myxogastres. 23 



having the spores produced externally on slender sporophores, a 

 feature met with only in the genus Ccralmm ; and Endosporeae, 

 having the spores produced in sporangia. In the second 

 " Aj^pendix " to the Monograph, amongst other changes in the 

 classification, the Exosporeae division is omitted altogether, 

 and the Eudosporous division alone retained. In Rostafinski's 

 classification the two primary divisions are founded on the 

 colour of the spores as seen under the microscope by transmitted 

 light; each primary division is further divided into two sections 

 determined by the presence or absence of a capillitium as 

 shown in the following arrangement — 



MYCETOZOA. 



ENDOSPOREAE. 



Amaurosporeae. Lamprosporeae. 



Spores violet or brownish- Spores yellow or brownish, 



violet. never violet. 



, \ I 



Atrichae. Trichophorae. Atrichae. Trichophorae. 



Von Tieghen uses the name Myxomycdes in a broader sense 

 than De Bary's Mi/ccf ozoa, ciud arranges the groups as follows: — ^ 



MYXOMYCETES. 



THALLUS. 



I 



Unicellular. Pluricellular. 



without a Plasmodium. _ I 



= Plasmodiophoreae. r 



1 I 



I cells aggregated but not fusii 



to form a plasmcdinni. 

 I =Acra.sieae. 



Cells fusing to form 

 a Plasmodium. 



^ ! ^ 



Spores produced in Spores produced externally, 



a sporangium. =Ceratikae. 



= Endoiiyxeak. 



1 Traitcdc lJu(on>\ji',; p. 992 (1884). 



