Ecology and Phenology of Surrey Mycetozoa. 75 



covered \\ith a close reticulation of small mesh. 0. flavidum, 



which should be met \nth in similar situations, has so far eluded 

 the \-igilance of all hunters in the county. 



*I07. Hemitrichia Vespariiim Macbr. has been found at Wey- 

 bridge in November, inside a decaved stump of Lombardy 

 poplar, at Virginia Water in October and at Horsley in January 

 on an old beech stump. 



loS. H. kiotricha Lister has only once been reported in 

 the county, on a dead beech leaf at Witley in December 1S9S. 

 109. H. clavata Rost. was discovered in April at Reigate and 

 once, but then plentifully, at Weybridge in October, on a 

 rotting horse-chestnut trunk. 



-no. H. ahietina Lister has made only one recorded appear- 

 ance in Surrey, on the trunk of a h\-ing oak, at Hind head. 



*iii. H. minor G. Lister var. pardina Minakata was first met 

 \nth in this county in March and April 1922, after a wet spring. 

 The sporangia were gro^^■ing on rotten stems of i\-\- among over- 

 hanging foliage on a rockery ; on another occasion thev were on 

 rotting ivy leaves and stems King on the ground under trees. 



112. H. Karstenii Lister is frequently encountered on holly 

 bark and the deca^-ing bark of lime sticks especially in No- 

 vember. This species is ver\- variable internally : some specimens 

 collected had faint spirals on the stout walled bro\Mi capiUitium, 

 while others had pale yellow spores and capillitium, the latter, 

 though ver\- slender and irregular, being marked bv distinct 

 spirals. 



113. Arcyria ferruginea Sauter is of common occurrence in 

 autumn and ^^'inter. It has been found from March to May 

 and from October to January on the wood of pine, cvpress, oak, 

 alder, fir, yew and larch. I once saw a pine log 4 ft. long and 

 9 inches in diameter almost covered \\-ith thousands of sporangia 

 of this species, yellow forms and the more usual orange-red 

 occurring in the same development. 



114. A. cinerea Pers. has been met \\-ith regularlv from 

 February- to November, more commonly on Hme wood but also 

 on dead leaves and even on old straw. 



*ii5. .4. carnea G. Lister appeared in October on rotting 

 elder bark and hme sticks, resembling pale forms of A . incarnata 

 but distinguishable by the capiUitium remaining attached to 

 the cup. 



116. A. pomiformis Rost. At first glance this is verv hke a 

 yellow form of A. cinerea, but the looser network of the capiUi- 

 tium is diagnostic and the species shows a preference for oak 

 wood. It is frequent from May onwards and has even been 

 recorded on U\-ing oak. 



117. A. denitdata Wettstein may be gathered any month of 



