290 A Monograph of the Myxogastres. 



addition a sprinkling of large, superficial, snow-white, amorphous 

 lumps of lime; stem about equalling the sporangium, from 

 dirty grey to brown, dilated downwards, and passing into a dark 

 hypothallus, longitudinally striate ; capillitium colourless, form- 

 ing an irregular net, threads very thin, often flexuous, nodes 

 small, often flattened, only very few containing lime; spores 

 globose, minutely ivarted, 9 10 /m diameter. 



Physarum granulatum, Balf., Grev., vol. x., p. 116 ; Sacc., 

 Syll., n. 1204. 



(Type in Herb., Kew.) 



On wood. In Herb. Currey, Kew. No locality, but un- 

 doubtedly British. 



About 1*5 mm. high, closely resembling Physarum leucopliaeum 

 in the capillitium and spores, but distinguished by the large 

 granules of bicarbonate of lime on the sporangial wall. In the 

 capillitium the present species approaches the genus Tilmadoche, 

 but differs in the great amount of lime on the sporangium wall. 



Physarum PMllipsii, Balf. fil. (figs. 77, 



Sporangia stipitate or subsessile, laterally compressed, irregular, 

 subreniform, subpyriform, sometimes coalescing, dark grey, 

 generally more or less rugose, with numerous minute, white, 

 innate particles of lime ; stem much shorter than sporangium, 

 thick, often flattened, blackish, sometimes almost obsolete ; colu- 

 mella absent; capillitium well developed, white, knots of lime 

 large, irregular, numerous, connected by short, thin portions; 

 spores lilac, globose, minutely ivarted, 10 12 p diameter. 



Physarum Phillipsii, Balf. fil., Grev., vol. x., p. 116; Sacc., 

 Syll, n. 1208. 



(Type in Herb., Kew.) 



On manured ground in an orchard house. Shrewsbury. 



A very marked species, possibly having its nearest ally in 

 Physarum nephroideum, Rost. (I. B. B.). 



Mr. A. Lister has appended the following note to the type 

 specimen of the present species in the Kew Herbarium : 



" Should not this be called Physarum compression, A. and S., 



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