96 THE JOURNAL OF BOTANY 



(alt. 3440 ft.) the principal trees were limes, sycamores, hazels, 

 and alders. Near Mu.rren (alt. 5390 ft.) our hunting grounds were 

 steep spruce woods with an undergrowth of bramble, Adenostyles, 

 Mulgedium, kc. ; and also the exposed turf of the higher Alps, 

 where dead scapes of Cirsium spinosissimum yielded abundance 

 of several alpine forms of Mycetozoa. 



In the following list of the species found the abbreviation L. 

 indicates that the species was obtained near Lucerne, E. near 

 Reichenbach, H. at Hohfluh, and M. near Miirren. A dagger 

 precedes the names of those species not given in the lists of 

 Swiss Mycetozoa published by Prof. Schinz * and M. Meylan,! 

 and which, as far as I know, have not before been recorded for 

 Switzerland. 



Ceratiomyxa fruticulosa (Mueller) Macbr. L., M. 



Physarum nutans Pers. L. — \P. auriscalpium Cooke. H. 

 Two groups of both very shortly stalked and sessile sporangia 

 were found on twigs and dead leaves. — P. sinuosum (Bull.) Weinm. 

 L., H. — P. contextum Pers. R. Very abundant on leaves and 

 twigs of lime. 



Crater ium minutum (Leers.) Fries. L., R. 



Fuligo septica (L.) Gmel. L., R., M. Both yellow and white 

 aethalia were found. 



Leocar pus frag His (Dickson) Rost. R., H. 



Diderma effusum (Schwein.) Morgan. R. — D. hemispliericum 

 (Bull.) Hornem. H., R. — D. radiatum (L.) Lister. H. 



Diderma globosum Pers. R. Very abundant both in the 

 Plasmodium and fruiting stage, spreading over leaves, twigs, moss 

 and lichen, and even over rocks, under shady trees. The sporangia 

 are clothed with an egg-shell-like crust of granules of calcium- 

 carbonate, which separates at a touch from the membranous inner 

 walls. In these specimens the spores are not quite so dark or so 

 large as in typical I), globosum, measuring 9 to 11 jx, instead of 

 11 to 12 [x or more; in this respect they approach D. spumarioides 

 Fr., to which D. globosum is nearly allied. 



Didjjmium difforme (Pers.) Duby. R., M. Abundant on dead 

 Cirsium on the high Alps. — D. clavus (Alb. & Schw.) Rost. H. 

 On moss on shady rocks. — D. nigripes Fr. L., H. — D. melano- 

 spermum (Pers.) Macbr. L., M. — D. squamulosum (Alb. & Schw.) 

 Fr. L., H. 



Didymium Wilczekii Meylan. M. Found in moderate abun- 

 dance on dead scapes of Cirsium spinosissimum on the high Alps. 

 Some of these gatherings are interesting for showing stages inter- 

 mediate between this species and Lepidoderma Carestianum Rost. 

 The typical sporangia are covered with a continuous layer of 

 minute crystals of calcium-carbonate ; other sporangia have the 

 investing crystals clustered to form flat closely set scales ; while 



* See Schinz, Die Myxumxjceten oder Schleimpihe der Schtceiz, 1906. 

 f See Meylan, " Contributions a la Connaissance des Myxomycetes du 

 Jura" in Bull. Soc. Vaud. xliv. 285 (1908), and xlvi. 49 (1910). 



