216 NOTES ON SOME RARE SPECIES OF MYCETOZOA. 



collected by Miss A. Cleve at Njammets, Lapponia Luleusis, 

 Sweden, Sept. 9tb, 1896. 'The sporangia are globose and sessile, 

 agreeing in all respects with the above, except that the spores 

 have a more olivaceous colour. As in the former gathering, the 

 sporangium-wall consists of a yellow membrane, entirely free from 

 granular deposits, and so delicate as to be embossed with the 

 impression of the spores beneath. The elaters measure 4 /x in 

 thickness, and have regular but faint spiral bands ; the tips taper 

 gradually, or end in a short point beyond a bulbous swelling. The 

 spores are nearly smooth, 11 /x diam. There appears to be sufficient 

 evidence to establish the integrity of the species, and I should give 

 it the name of Trichia lutescens. 



T. BoTRYTis var. munda, n.var. This variety is distinguished 

 from var. a. by its usually smaller size, by the almost invariably 

 mottled sporangium-'wall, by the habitat being on dead leaves of 

 oak, hornbeam, &c., rarely on wood; but especially by the smooth, 

 neat elaters having about four bands which are perfectly regular 

 and close in their spiral arrangement, and do not project above the 

 intermediate spaces. The elaters are pale brown in colour, 3'5 /x 

 in thickness, with moderately long tapering points. The character 

 of the spiral bands is a constant one, as evidenced by gatherings by 

 Prof. I. Bayley Balfour at Moffat about the year 1879; by Mr. J. 

 Saunders at Pepperstock, Beds, in Oct. 189i ; and by ourselves in 

 the Black Forest near Freiburg, repeatedly in the neighbourhood of 

 Lyme Regis, and abundantly in Epping Forest. Although a dis- 

 tinct variety, the spores are similar to those of var. «, and it 

 resembles that form so nearly in other characters that it cannot be 

 called a distinct species. The varietal name of munda is given on 

 account of the neat elaters. 



Hemitrichia intorta, var. leiotricha Lister, has been found in 

 Wanstead Park and Epping Forest during last autumn. In one 

 locality eighty-one sporangia were collected on dead leaves under 

 brambles on a space little more than a foot wide. Considering the 

 scattered habit of the species, this was a large gathering. 



Arcvria ferruginea Saut. This species is subject to much 

 variation both in the colour of the sporangia and in the surface 

 thickenings of the capillitium, but the large spores, about 9 /x diam., 

 distinguish all forms of this and the doubtfully distinct Californiau 

 species A. versicolor from other members of the genus. The 

 differences noticed in the capillitium-threads consist in the varied 

 arrangement of spines, bauds, and reticulations, and in the presence 

 or absence of free ends. Several species have been created from 

 time to time based on these characters. The specimen named 

 Hf'terotrichiii GabrieUcB Mass., from S. Carolina, in the Kew Col- 

 lection, has been especially noted as distinct from A. ferruginea by 

 the numerous free ends projecting from the network of the 

 capillitium, but in some sporangia of that specimen I can find 

 no free ends. ^./tr/'U^mca was unusually abundant last autumn 

 in many localities. In my garden at Leytonstone a growth came 

 up in November on a decaying trunk of Scotch fir, extending for 



