170 



J. AND E. SAUNDEES — 



P. straminipes, List., P. Crafcriachea, List., Craterhcm peduncidatum, 

 Trent., C. leucocephalum, Ditm., C. miUabile, Fr., Chondrioderma 

 spumaroides, Host., C. Michelii, Rost., Perichcena van'ahilis, E.ost. 



Species usually found at or below the line of saturation : — 

 Didi/mium dijforme^ J)\\hj, and D. Trochus, List. 



In regard to D. Trochus, List., it is remarkable that it rarely 

 fruits in any other situation than where the material is saturated 

 with moisture. We have had under observation during the last 

 three seasons many thousands of the sporangia of this species, 

 and it is most rare to find any of them near the surface, or in 

 such situations as would favour the dispersal of the spores. They 

 are usually so charged with moisture that it is expedient to raise 

 the lower layers of straw, and spread them out to the wind, 

 when the sporangia rapidly dry and are thus rendered conspicuous. 

 jS^otwithstanding these apparent obstacles to the distribution of the 

 spores, recent observations prove that this species is of frequent 

 occurrence in the South Midlands over an area of eight miles square. 

 It has also been observed near Reigate by Mr. E. S. Salmon. 



The following list represents what has been noticed as to the 

 habitats of the Mycetozoa in numerous localities in the South 

 of England. The observations have ranged from Merioneth to 

 Norfolk, and from North Devon to Kent, but the largest proportion 

 of them are from the counties of Beds, Herts, and Bucks. The few 

 entries that are not original are based upon specimens which have 

 been kindly forwarded to us by Mr. A. Lister, Mr. C. Crouch, and 

 Mr. George Massee. 



The term Wood includes rotten branches, trunks, and tree stumps ; 

 Straw includes the refuse and haulms of cereals, peas, beans, and 

 the agrarian weeds associated with them ; Leaves include the twigs 

 of wood usually found associated with them. 





Ceratiomyxa mucida, 

 Schroeter 



Badhamia hyalina. JSerA;. 



B. iitriciilaris, Berk 



B. follicola, Lister ... 



B. niteiip, Berk 



B. macrocarpa, Rost. 



B. paiiicea, Rost 



B. ovispora, Racib. ... 



B. lilacina, Rost 



B. rubigiuosa, Rost. ... 



Pliysarum leiicopus. 

 Link 



P. rimiiinim, Lister.... 



P. citrinum, Schiini.... 



P. psittaciuuni, Ditm.. 



Physarum viride, Pers. 

 P. nutaus, Pers 



,, iwr. leucophseum 



P. calidris, Lister 



P. compressum, Alh. & 



Sc/iw 



P. straminipes, Lister. 

 P. didermoides. Rost. . 

 ,, var. lividum, 

 Lister . . . 

 P. Crateriachea, Lister 

 P. cinereum, Rcrs. ... 



P. bivalve, Pers 



P. Diderma, R st 



P. coutextum, Pers. ... 

 P. coiiglouieratum, i?o«<. 



