26 EXOSPORILE. [CERATIOMYXA. 



The sporophores are subject to much variation in form, and 

 may all be either white or pinkish -yellow. 



a. genuina : branches of sporophores short, free. 



j3. flexuosa : sporophores consisting of a loose flexuose system 

 of slender white threads, profusely branching but not anastomosing, 

 and averaging about "02 mm. in diameter, increasing to 0'5 mm. 

 at the base, the ultimate branchlets somewhat clavate. In other 

 characters this corresponds with the type. Ceratium filiforme 

 Berk. & Br., in Journ. Linn. Soc., xiv., p. 97. 



y. porioides : differs from the type only in the dense arrangement 

 of the sporophores. As intermediate forms occur which unite it 

 with the type, I cannot consider it specifically distinct. Super- 

 ficially it suggests the appearance of Polyporus vulgaris, though 

 much more minute. Ceratium porioides Alb.& Schw.,Consp. Fung., 

 p. 359 ; Fr., Syst. Myc., iii., p. 295 ; Fam. & Wor., in Mem. Acad. 

 Imp. Petersb., Ser. 7, xx., p. 5; Zopf, Pilzthiere, pp. 64, 174. 



Plate I., A. Fig. a. var. genuina : sporophores, x 20 (England) ; &. 

 spores of the same, x 600 ; c. sporophores of a form approaching var. 

 jwrioides, x 20 (England) ; d. var. flexuosa : sporophores, x 20 (Borneo) ; 

 e. clavate end of sporophore of the same (all the spores but one have 

 fallen from their stalks), x 280. 



Hob. Plasmodium in rotten wood, fruiting on the outside. a. Lyme 

 Regis, Dorset (L:B.M.l) ; Iowa (LrB.M.l). a. and /3. Borneo (LrB.M.l). 

 y. Carlsruhe (Strassb. Herb.) ; Upsala (LrB.M.l) ; Iowa (B.M. 1025). 



Subclass II. ENDOSPORE^E. Spores developed within the 

 sporangia. 



Cohort I.AMA UROSPORALES. Capillitium always present. 

 Spores violet or violet-brown, but pale ferruginous in a few 

 species of Stemonitis and Comatricha. 



Subcohort I. CALGAEINEM. Deposits of lime in minute 

 granules, innate in the sporangium-wall or compacted in the 

 knots of the capillitium or in the stalk, or in crystals over the 

 sporangium-wall. 



Order I. PHYSARACE^E. Deposits of lime in minute granules, 

 more or less aggregated, not in crystals (except partially in 

 Chondrioderma Trevelyani], innate in the sporangium-wall, and 

 in vesicular expansions of the capillitium ( = lime knots), except 

 in Chondrioderma and Trichamphora, where there are no lime 

 knots, and in Diachcea, in which the lime is confined to the stalk 

 and columella. Sporangia simple except in Fuligo, where they 

 are combined into an eethalium. 



