16 MYXOMYCETKS. 



with a few shortly stipitate individuals, sessile and confluent 

 sporangia, as in var. sessile, form conglobatum. It is undoubtedly 

 an exceedingly variable species. 



The following two species are not included in Rostafinski's 

 Monograph. 



9. Physarum metallicum. Berli. 



Sporangia subglobose, slightly depressed, a line or more in 

 diameter, sessile, quite smooth, very delicate, of a most beautiful 

 metallic appearance, bursting irregularly ; capillitiuin and spores 

 pink-grey ; walls single. Mag. Zool. 4' Bot., No. 29. 



On decorticated stick. 



Physarum metallicum. Berk. Mag. Zool. & Bot., No. 29, t. 3, 

 f. 8 ; ' Cooke Handbk., No. 1139. 



10. Physarum Tussilaginis. Jl. $ Br. 



Sporangia sessile, roundish or irregular, flattened, broadly adnate, 

 slightly shining, smooth, livid grey; capillitium of delicate, thin, 

 nncoloured threads, with scarcely any evidence of the presence of 

 lime ; spores globose, dark-violet, rough. Ann. N . Hist., No. 1597. 



On leaves of Tussilago. 



Batlliamia capsulifer. Cooke Fungi Brit., Ser. i., No. 526 ; 

 Ser. ii., No. 206. 



Physarwn Tussilaginis. B. & Br. Ann. Nat. Hist., No. 1597 ; 

 Grevillea, v. p. 12. 



This is not a good species of Physarum-, there is scarcely any 

 lime, or capillitium. 



\Pliysarum atntm, Fr. S. M. iii., 147 ; Berk., Ann. N. Hist., 

 216; Cooke Handbk., No. 1141. Rostafinski excludes this from 

 Myxomycetes, under the name of Apiosporium imersum.~\ 



PHYSARUM. 



ANALYTICAL TABLE OF THE SPECIES. 



[This table is given as compiled by Rostafinski, the names of species 

 found in Britain being in small capitals, the residue in italics.] 



A. Wall of sporangium, single. 



Granules of lime more or less rounded. 

 * Wall of sporangium, after losing 



the lime, uncoloured. 



Sporangium stipitate or sessile . candidnm. 

 ** Wall of sporangium, after losing 

 the lime, at least in the lower 

 part, violet coloured. 



