List of Mycetozoa, Selhy. GuUelma Lister. 89 



Lamprodenna scintillans. Altogether twenty-four species were 

 seen that day. On Wednesday, September nth, the Escrick 

 Woods were visited. These consisted of plantations of young 

 sycamore and Scots pme, and also of extensive young birch 

 woods having a dense undergrowth of bracken sheltering old 

 decaying stumps of birch ; further on was older mixed woodland. 

 Although only eight species of Mycetozoa were collected, the 

 list included Collodcrma ocidatum, recorded only once before 

 in Yorkshire. It occurred in some abundance among moss 

 and liverworts on old birch stumps; the shining dark-brown 

 sporangia could hardly be detected without the aid of a lens, 

 and even then were easily confused with the numerous minute 

 beetle-mites {Orihatidae) that were slowly crawling about the 

 same moss. Some of this moss brought indoors and kept 

 moist has produced fresh crops of Collodcrma sporangia up to 

 the end of October. Parlington Park was visited on Thursday, 

 September 12th, a rather gloomy and showery day, but affording 

 the party a harvest of thirty-three species of Mycetozoa. The 

 most noteworthy of these was perhaps Physarum psittadnum, 

 on dead ash wood; it appears to be ar completely summer 

 species, and was found lingering on in a mouldy condition. 

 Badhamia panicea and Physarum compressuni were setn on a 

 felled sycamore within a few feet of each other ; the two species 

 seem to be frequently associated. Didymiiiui mdanosperuiiun 

 occurred, as usual, on coniferous wood ; Physarum sinuosinn 

 and Diderma hemispJiericum were also found. On Friday, 

 September 13th, search was made in Staynor Wood. Here 

 oak was the prevalent tree, with some undergrowth of bramble 

 and much of bracken, neither of which yielded M3/cetozoa in 

 any abundance. On some old yew stumps were found three 

 species of Cribraria, a genus usually frequenting coniferous 

 wood. The species were C. rufa, C. aurantiaca and C. intricata ; 

 the last is common in the tropics and in the United States of 

 America, but rare in Britain ; it does not appear to have been 

 recorded before from Yorkshire. In a stretch of swampy ground, 

 under sycamores, the dead leaves and lower parts of stems 

 of yellow iris and gipsywort were adorned with a magnificent 

 growth of 'Diachaca Icucopoda, extending intermittently over 

 an area of about forty-eight square yards. In the same 

 swamp a specimen of the elegant var. tenerrima of Couiatricha 

 piilchclla was found. 



The following list gives the species recorded during the whole 

 foray. 0. stands for Osgoodby Woods, C. for Camblesforth, 

 B. for Bishop's Wood, By. for Byram Park, E. for Escrick, 

 P. for Parlington, and 5. for Staynor Wood. 



