104 ENDOSPORE^. [SPUMARIA. 



The following species are excluded by Eostafinski for what 

 appear to be sufficient reasons (see Rest., Mon., p. 229-301) : — 



B. Linhii Fr. 



B. muscicola Link. 



D. nanum, Fr. & Wein. 



jD. parietinwm Schrad. 



D. plicatv/m Oorda. 



B. Weinmannii Fr. 



B. Sowerhyi Berk., in Sm. Eng. Flora, Fungi, p. 313, must also 

 be excluded, as the description is too imperfect to determine what 

 it is. 



SPECIES EXCLUDED FROM THE GENUS. 



B. australis Mass. = TriohamphorapezizoideaZ\m^. 



B. Barteri Mass. = Physarrwrn glohvMferum Pers. 



B. echinospora Mass. = Phymrum compressum A. & S. 



B. erythrinum Berk, k Curt. = Physarum pulohripes Peck. 



B . flavicomum Mass. = Physarum Berheleyi Bost. 



B. granuUferum PhUl. . = See note after Lepidoderma 



Garestianum Eost. 



B. ohrusseum Berk. & Curt. = Physarum polymorphum Rost. 



B. paraguayense Speg. = Graterium rubescens Bex. 



B. pezizoideum Mass. = Triohamphora pezizoideaJnngh. 



B. sinapinum Cooke. ^ Physarum virescens Ditm. 



B. spumarioides Fr. ^ Ghondrioderma spumarioides 



Bost. 



B. tenerrim,um Berk. & Curt. = Physa/rum polymorphum Rost. 



B. Zeylanicv/m Berk. & Br. = TrichamphorapezizoideaSvtn^. 



Genus 13.— SPUMARIA Persoon, Obs. Myc, i., p. 92 (1796). 

 The sporangia are confluent to form an sethalium, otherwise the 

 characters are those of the genus Bidymiv/m. 



1. S. alba DC, Fl. Fr., ii., p. 261 (1805). Plasmodium 

 opaque-white, among grass and dead leaves, .^thalia composed 

 of elongated, compressed and folded, lobed and confluent, grey 

 sporangia, arising in more or less loosely compacted clusters from 

 branching processes of the membranous hypothallus, clothed with 

 a thick but fragile and deciduous, white, universal covering of 

 crystals of lime ; 2 to 4 cm. long, 1 to 2 cm. wide, and about 

 1 cm. thick. Sporangium-wall membranous, purplish or colour- 

 less. Columella membranous, hollow, compressed, following in 

 its branches the form of the confluent sporangia, sometimes 

 absent. Capillitium a network of widely branching, anastomosing, 

 stout, purplish-brown threads, with numerous dark calyciform 

 thickenings, hyahne at the extremities where they are attached 

 to the sporangium-wall or columella ; these are accompanied 

 occasionally with tubular processes of the sporangium-wall, open 

 externally, and either completely perforating the flattened lobes 



